21000798728

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{176977}}^1$

素因数の和:177166

約数の個数: 64

約数和(自身を含む): 48760978560

約数和(自身を除く): 27760179832

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 163, 182, 326, 364, 652, 728, 1141, 1304, 2119, 2282, 4238, 4564, 8476, 9128, 14833, 16952, 29666, 59332, 118664, 176977, 353954, 707908, 1238839, 1415816, 2300701, 2477678, 4601402, 4955356, 9202804, 9910712, 16104907, 18405608, 28847251, 32209814, 57694502, 64419628, 115389004, 128839256, 201930757, 230778008, 375014263, 403861514, 750028526, 807723028, 1500057052, 1615446056, 2625099841, 3000114104, 5250199682, 10500399364, 21000798728]

約数ペア:

[(1, 21000798728), (2, 10500399364), (4, 5250199682), (7, 3000114104), (8, 2625099841), (13, 1615446056), (14, 1500057052), (26, 807723028), (28, 750028526), (52, 403861514), (56, 375014263), (91, 230778008), (104, 201930757), (163, 128839256), (182, 115389004), (326, 64419628), (364, 57694502), (652, 32209814), (728, 28847251), (1141, 18405608), (1304, 16104907), (2119, 9910712), (2282, 9202804), (4238, 4955356), (4564, 4601402), (8476, 2477678), (9128, 2300701), (14833, 1415816), (16952, 1238839), (29666, 707908), (59332, 353954), (118664, 176977)]