81286400

素因数分解:

$2^8\times 5^2\times {\mathrm{13}}^1\times {\mathrm{977}}^1$

素因数の和:1016

約数の個数: 108

約数和(自身を含む): 216894972

約数和(自身を除く): 135608572

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 50, 52, 64, 65, 80, 100, 104, 128, 130, 160, 200, 208, 256, 260, 320, 325, 400, 416, 520, 640, 650, 800, 832, 977, 1040, 1280, 1300, 1600, 1664, 1954, 2080, 2600, 3200, 3328, 3908, 4160, 4885, 5200, 6400, 7816, 8320, 9770, 10400, 12701, 15632, 16640, 19540, 20800, 24425, 25402, 31264, 39080, 41600, 48850, 50804, 62528, 63505, 78160, 83200, 97700, 101608, 125056, 127010, 156320, 195400, 203216, 250112, 254020, 312640, 317525, 390800, 406432, 508040, 625280, 635050, 781600, 812864, 1016080, 1250560, 1270100, 1563200, 1625728, 2032160, 2540200, 3126400, 3251456, 4064320, 5080400, 6252800, 8128640, 10160800, 16257280, 20321600, 40643200, 81286400]

約数ペア:

[(1, 81286400), (2, 40643200), (4, 20321600), (5, 16257280), (8, 10160800), (10, 8128640), (13, 6252800), (16, 5080400), (20, 4064320), (25, 3251456), (26, 3126400), (32, 2540200), (40, 2032160), (50, 1625728), (52, 1563200), (64, 1270100), (65, 1250560), (80, 1016080), (100, 812864), (104, 781600), (128, 635050), (130, 625280), (160, 508040), (200, 406432), (208, 390800), (256, 317525), (260, 312640), (320, 254020), (325, 250112), (400, 203216), (416, 195400), (520, 156320), (640, 127010), (650, 125056), (800, 101608), (832, 97700), (977, 83200), (1040, 78160), (1280, 63505), (1300, 62528), (1600, 50804), (1664, 48850), (1954, 41600), (2080, 39080), (2600, 31264), (3200, 25402), (3328, 24425), (3908, 20800), (4160, 19540), (4885, 16640), (5200, 15632), (6400, 12701), (7816, 10400), (8320, 9770)]