16178420

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1\times {\mathrm{149}}^1$

素因数の和:308

約数の個数: 48

約数和(自身を含む): 35154000

約数和(自身を除く): 18975580

約数列:

[1, 2, 4, 5, 10, 20, 61, 89, 122, 149, 178, 244, 298, 305, 356, 445, 596, 610, 745, 890, 1220, 1490, 1780, 2980, 5429, 9089, 10858, 13261, 18178, 21716, 26522, 27145, 36356, 45445, 53044, 54290, 66305, 90890, 108580, 132610, 181780, 265220, 808921, 1617842, 3235684, 4044605, 8089210, 16178420]

約数ペア:

[(1, 16178420), (2, 8089210), (4, 4044605), (5, 3235684), (10, 1617842), (20, 808921), (61, 265220), (89, 181780), (122, 132610), (149, 108580), (178, 90890), (244, 66305), (298, 54290), (305, 53044), (356, 45445), (445, 36356), (596, 27145), (610, 26522), (745, 21716), (890, 18178), (1220, 13261), (1490, 10858), (1780, 9089), (2980, 5429)]