638996800

素因数分解:

$2^6\times 5^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{991}}^1$

素因数の和:1057

約数の個数: 168

約数和(自身を含む): 1749665792

約数和(自身を除く): 1110668992

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 31, 32, 40, 50, 52, 62, 64, 65, 80, 100, 104, 124, 130, 155, 160, 200, 208, 248, 260, 310, 320, 325, 400, 403, 416, 496, 520, 620, 650, 775, 800, 806, 832, 991, 992, 1040, 1240, 1300, 1550, 1600, 1612, 1982, 1984, 2015, 2080, 2480, 2600, 3100, 3224, 3964, 4030, 4160, 4955, 4960, 5200, 6200, 6448, 7928, 8060, 9910, 9920, 10075, 10400, 12400, 12883, 12896, 15856, 16120, 19820, 20150, 20800, 24775, 24800, 25766, 25792, 30721, 31712, 32240, 39640, 40300, 49550, 49600, 51532, 61442, 63424, 64415, 64480, 79280, 80600, 99100, 103064, 122884, 128830, 128960, 153605, 158560, 161200, 198200, 206128, 245768, 257660, 307210, 317120, 322075, 322400, 396400, 399373, 412256, 491536, 515320, 614420, 644150, 644800, 768025, 792800, 798746, 824512, 983072, 1030640, 1228840, 1288300, 1536050, 1585600, 1597492, 1966144, 1996865, 2061280, 2457680, 2576600, 3072100, 3194984, 3993730, 4122560, 4915360, 5153200, 6144200, 6389968, 7987460, 9830720, 9984325, 10306400, 12288400, 12779936, 15974920, 19968650, 20612800, 24576800, 25559872, 31949840, 39937300, 49153600, 63899680, 79874600, 127799360, 159749200, 319498400, 638996800]

約数ペア:

[(1, 638996800), (2, 319498400), (4, 159749200), (5, 127799360), (8, 79874600), (10, 63899680), (13, 49153600), (16, 39937300), (20, 31949840), (25, 25559872), (26, 24576800), (31, 20612800), (32, 19968650), (40, 15974920), (50, 12779936), (52, 12288400), (62, 10306400), (64, 9984325), (65, 9830720), (80, 7987460), (100, 6389968), (104, 6144200), (124, 5153200), (130, 4915360), (155, 4122560), (160, 3993730), (200, 3194984), (208, 3072100), (248, 2576600), (260, 2457680), (310, 2061280), (320, 1996865), (325, 1966144), (400, 1597492), (403, 1585600), (416, 1536050), (496, 1288300), (520, 1228840), (620, 1030640), (650, 983072), (775, 824512), (800, 798746), (806, 792800), (832, 768025), (991, 644800), (992, 644150), (1040, 614420), (1240, 515320), (1300, 491536), (1550, 412256), (1600, 399373), (1612, 396400), (1982, 322400), (1984, 322075), (2015, 317120), (2080, 307210), (2480, 257660), (2600, 245768), (3100, 206128), (3224, 198200), (3964, 161200), (4030, 158560), (4160, 153605), (4955, 128960), (4960, 128830), (5200, 122884), (6200, 103064), (6448, 99100), (7928, 80600), (8060, 79280), (9910, 64480), (9920, 64415), (10075, 63424), (10400, 61442), (12400, 51532), (12883, 49600), (12896, 49550), (15856, 40300), (16120, 39640), (19820, 32240), (20150, 31712), (20800, 30721), (24775, 25792), (24800, 25766)]