21865580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{5231}}^1$

素因数の和:5270

約数の個数: 48

約数和(自身を含む): 52738560

約数和(自身を除く): 30872980

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 190, 209, 220, 380, 418, 836, 1045, 2090, 4180, 5231, 10462, 20924, 26155, 52310, 57541, 99389, 104620, 115082, 198778, 230164, 287705, 397556, 496945, 575410, 993890, 1093279, 1150820, 1987780, 2186558, 4373116, 5466395, 10932790, 21865580]

約数ペア:

[(1, 21865580), (2, 10932790), (4, 5466395), (5, 4373116), (10, 2186558), (11, 1987780), (19, 1150820), (20, 1093279), (22, 993890), (38, 575410), (44, 496945), (55, 397556), (76, 287705), (95, 230164), (110, 198778), (190, 115082), (209, 104620), (220, 99389), (380, 57541), (418, 52310), (836, 26155), (1045, 20924), (2090, 10462), (4180, 5231)]