21581756

素因数分解:

$2^2\times 7^2\times {\mathrm{149}}^1\times {\mathrm{739}}^1$

素因数の和:906

約数の個数: 36

約数和(自身を含む): 44289000

約数和(自身を除く): 22707244

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 149, 196, 298, 596, 739, 1043, 1478, 2086, 2956, 4172, 5173, 7301, 10346, 14602, 20692, 29204, 36211, 72422, 110111, 144844, 220222, 440444, 770777, 1541554, 3083108, 5395439, 10790878, 21581756]

約数ペア:

[(1, 21581756), (2, 10790878), (4, 5395439), (7, 3083108), (14, 1541554), (28, 770777), (49, 440444), (98, 220222), (149, 144844), (196, 110111), (298, 72422), (596, 36211), (739, 29204), (1043, 20692), (1478, 14602), (2086, 10346), (2956, 7301), (4172, 5173)]