990445040

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{991}}^1$

素因数の和:1079

約数の個数: 120

約数和(自身を含む): 2565085824

約数和(自身を除く): 1574640784

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 40, 52, 62, 65, 80, 104, 124, 130, 155, 208, 248, 260, 310, 403, 496, 520, 620, 806, 961, 991, 1040, 1240, 1612, 1922, 1982, 2015, 2480, 3224, 3844, 3964, 4030, 4805, 4955, 6448, 7688, 7928, 8060, 9610, 9910, 12493, 12883, 15376, 15856, 16120, 19220, 19820, 24986, 25766, 30721, 32240, 38440, 39640, 49972, 51532, 61442, 62465, 64415, 76880, 79280, 99944, 103064, 122884, 124930, 128830, 153605, 199888, 206128, 245768, 249860, 257660, 307210, 399373, 491536, 499720, 515320, 614420, 798746, 952351, 999440, 1030640, 1228840, 1597492, 1904702, 1996865, 2457680, 3194984, 3809404, 3993730, 4761755, 6389968, 7618808, 7987460, 9523510, 12380563, 15237616, 15974920, 19047020, 24761126, 31949840, 38094040, 49522252, 61902815, 76188080, 99044504, 123805630, 198089008, 247611260, 495222520, 990445040]

約数ペア:

[(1, 990445040), (2, 495222520), (4, 247611260), (5, 198089008), (8, 123805630), (10, 99044504), (13, 76188080), (16, 61902815), (20, 49522252), (26, 38094040), (31, 31949840), (40, 24761126), (52, 19047020), (62, 15974920), (65, 15237616), (80, 12380563), (104, 9523510), (124, 7987460), (130, 7618808), (155, 6389968), (208, 4761755), (248, 3993730), (260, 3809404), (310, 3194984), (403, 2457680), (496, 1996865), (520, 1904702), (620, 1597492), (806, 1228840), (961, 1030640), (991, 999440), (1040, 952351), (1240, 798746), (1612, 614420), (1922, 515320), (1982, 499720), (2015, 491536), (2480, 399373), (3224, 307210), (3844, 257660), (3964, 249860), (4030, 245768), (4805, 206128), (4955, 199888), (6448, 153605), (7688, 128830), (7928, 124930), (8060, 122884), (9610, 103064), (9910, 99944), (12493, 79280), (12883, 76880), (15376, 64415), (15856, 62465), (16120, 61442), (19220, 51532), (19820, 49972), (24986, 39640), (25766, 38440), (30721, 32240)]