21610540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{947}}^1$

素因数の和:1126

約数の個数: 48

約数和(自身を含む): 52238592

約数和(自身を除く): 30628052

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 163, 326, 652, 815, 947, 1141, 1630, 1894, 2282, 3260, 3788, 4564, 4735, 5705, 6629, 9470, 11410, 13258, 18940, 22820, 26516, 33145, 66290, 132580, 154361, 308722, 617444, 771805, 1080527, 1543610, 2161054, 3087220, 4322108, 5402635, 10805270, 21610540]

約数ペア:

[(1, 21610540), (2, 10805270), (4, 5402635), (5, 4322108), (7, 3087220), (10, 2161054), (14, 1543610), (20, 1080527), (28, 771805), (35, 617444), (70, 308722), (140, 154361), (163, 132580), (326, 66290), (652, 33145), (815, 26516), (947, 22820), (1141, 18940), (1630, 13258), (1894, 11410), (2282, 9470), (3260, 6629), (3788, 5705), (4564, 4735)]