21320000

素因数分解:

$2^6\times 5^4\times {\mathrm{13}}^1\times {\mathrm{41}}^1$

素因数の和:86

約数の個数: 140

約数和(自身を含む): 58321956

約数和(自身を除く): 37001956

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 41, 50, 52, 64, 65, 80, 82, 100, 104, 125, 130, 160, 164, 200, 205, 208, 250, 260, 320, 325, 328, 400, 410, 416, 500, 520, 533, 625, 650, 656, 800, 820, 832, 1000, 1025, 1040, 1066, 1250, 1300, 1312, 1600, 1625, 1640, 2000, 2050, 2080, 2132, 2500, 2600, 2624, 2665, 3250, 3280, 4000, 4100, 4160, 4264, 5000, 5125, 5200, 5330, 6500, 6560, 8000, 8125, 8200, 8528, 10000, 10250, 10400, 10660, 13000, 13120, 13325, 16250, 16400, 17056, 20000, 20500, 20800, 21320, 25625, 26000, 26650, 32500, 32800, 34112, 40000, 41000, 42640, 51250, 52000, 53300, 65000, 65600, 66625, 82000, 85280, 102500, 104000, 106600, 130000, 133250, 164000, 170560, 205000, 213200, 260000, 266500, 328000, 333125, 410000, 426400, 520000, 533000, 666250, 820000, 852800, 1066000, 1332500, 1640000, 2132000, 2665000, 4264000, 5330000, 10660000, 21320000]

約数ペア:

[(1, 21320000), (2, 10660000), (4, 5330000), (5, 4264000), (8, 2665000), (10, 2132000), (13, 1640000), (16, 1332500), (20, 1066000), (25, 852800), (26, 820000), (32, 666250), (40, 533000), (41, 520000), (50, 426400), (52, 410000), (64, 333125), (65, 328000), (80, 266500), (82, 260000), (100, 213200), (104, 205000), (125, 170560), (130, 164000), (160, 133250), (164, 130000), (200, 106600), (205, 104000), (208, 102500), (250, 85280), (260, 82000), (320, 66625), (325, 65600), (328, 65000), (400, 53300), (410, 52000), (416, 51250), (500, 42640), (520, 41000), (533, 40000), (625, 34112), (650, 32800), (656, 32500), (800, 26650), (820, 26000), (832, 25625), (1000, 21320), (1025, 20800), (1040, 20500), (1066, 20000), (1250, 17056), (1300, 16400), (1312, 16250), (1600, 13325), (1625, 13120), (1640, 13000), (2000, 10660), (2050, 10400), (2080, 10250), (2132, 10000), (2500, 8528), (2600, 8200), (2624, 8125), (2665, 8000), (3250, 6560), (3280, 6500), (4000, 5330), (4100, 5200), (4160, 5125), (4264, 5000)]