20986840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{4409}}^1$

素因数の和:4444

約数の個数: 64

約数和(自身を含む): 57153600

約数和(自身を除く): 36166760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 17, 20, 28, 34, 35, 40, 56, 68, 70, 85, 119, 136, 140, 170, 238, 280, 340, 476, 595, 680, 952, 1190, 2380, 4409, 4760, 8818, 17636, 22045, 30863, 35272, 44090, 61726, 74953, 88180, 123452, 149906, 154315, 176360, 246904, 299812, 308630, 374765, 524671, 599624, 617260, 749530, 1049342, 1234520, 1499060, 2098684, 2623355, 2998120, 4197368, 5246710, 10493420, 20986840]

約数ペア:

[(1, 20986840), (2, 10493420), (4, 5246710), (5, 4197368), (7, 2998120), (8, 2623355), (10, 2098684), (14, 1499060), (17, 1234520), (20, 1049342), (28, 749530), (34, 617260), (35, 599624), (40, 524671), (56, 374765), (68, 308630), (70, 299812), (85, 246904), (119, 176360), (136, 154315), (140, 149906), (170, 123452), (238, 88180), (280, 74953), (340, 61726), (476, 44090), (595, 35272), (680, 30863), (952, 22045), (1190, 17636), (2380, 8818), (4409, 4760)]