21247928

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{10753}}^1$

素因数の和:10791

約数の個数: 32

約数和(自身を含む): 45166800

約数和(自身を除く): 23918872

約数列:

[1, 2, 4, 8, 13, 19, 26, 38, 52, 76, 104, 152, 247, 494, 988, 1976, 10753, 21506, 43012, 86024, 139789, 204307, 279578, 408614, 559156, 817228, 1118312, 1634456, 2655991, 5311982, 10623964, 21247928]

約数ペア:

[(1, 21247928), (2, 10623964), (4, 5311982), (8, 2655991), (13, 1634456), (19, 1118312), (26, 817228), (38, 559156), (52, 408614), (76, 279578), (104, 204307), (152, 139789), (247, 86024), (494, 43012), (988, 21506), (1976, 10753)]