20121220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{1423}}^1$

素因数の和:1540

約数の個数: 48

約数和(自身を含む): 48803328

約数和(自身を除く): 28682108

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 101, 140, 202, 404, 505, 707, 1010, 1414, 1423, 2020, 2828, 2846, 3535, 5692, 7070, 7115, 9961, 14140, 14230, 19922, 28460, 39844, 49805, 99610, 143723, 199220, 287446, 574892, 718615, 1006061, 1437230, 2012122, 2874460, 4024244, 5030305, 10060610, 20121220]

約数ペア:

[(1, 20121220), (2, 10060610), (4, 5030305), (5, 4024244), (7, 2874460), (10, 2012122), (14, 1437230), (20, 1006061), (28, 718615), (35, 574892), (70, 287446), (101, 199220), (140, 143723), (202, 99610), (404, 49805), (505, 39844), (707, 28460), (1010, 19922), (1414, 14230), (1423, 14140), (2020, 9961), (2828, 7115), (2846, 7070), (3535, 5692)]