21000739216

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{670693}}^1$

素因数の和:670823

約数の個数: 40

約数和(自身を含む): 43246349120

約数和(自身を除く): 22245609904

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 103, 152, 206, 304, 412, 824, 1648, 1957, 3914, 7828, 15656, 31312, 670693, 1341386, 2682772, 5365544, 10731088, 12743167, 25486334, 50972668, 69081379, 101945336, 138162758, 203890672, 276325516, 552651032, 1105302064, 1312546201, 2625092402, 5250184804, 10500369608, 21000739216]

約数ペア:

[(1, 21000739216), (2, 10500369608), (4, 5250184804), (8, 2625092402), (16, 1312546201), (19, 1105302064), (38, 552651032), (76, 276325516), (103, 203890672), (152, 138162758), (206, 101945336), (304, 69081379), (412, 50972668), (824, 25486334), (1648, 12743167), (1957, 10731088), (3914, 5365544), (7828, 2682772), (15656, 1341386), (31312, 670693)]