81448420

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{101}}^1\times {\mathrm{661}}^1$

素因数の和:832

約数の個数: 48

約数和(自身を含む): 175832496

約数和(自身を除く): 94384076

約数列:

[1, 2, 4, 5, 10, 20, 61, 101, 122, 202, 244, 305, 404, 505, 610, 661, 1010, 1220, 1322, 2020, 2644, 3305, 6161, 6610, 12322, 13220, 24644, 30805, 40321, 61610, 66761, 80642, 123220, 133522, 161284, 201605, 267044, 333805, 403210, 667610, 806420, 1335220, 4072421, 8144842, 16289684, 20362105, 40724210, 81448420]

約数ペア:

[(1, 81448420), (2, 40724210), (4, 20362105), (5, 16289684), (10, 8144842), (20, 4072421), (61, 1335220), (101, 806420), (122, 667610), (202, 403210), (244, 333805), (305, 267044), (404, 201605), (505, 161284), (610, 133522), (661, 123220), (1010, 80642), (1220, 66761), (1322, 61610), (2020, 40321), (2644, 30805), (3305, 24644), (6161, 13220), (6610, 12322)]