21169960

素因数分解:

$2^3\times 5^1\times 7^3\times {\mathrm{1543}}^1$

素因数の和:1575

約数の個数: 64

約数和(自身を含む): 55584000

約数和(自身を除く): 34414040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 343, 392, 490, 686, 980, 1372, 1543, 1715, 1960, 2744, 3086, 3430, 6172, 6860, 7715, 10801, 12344, 13720, 15430, 21602, 30860, 43204, 54005, 61720, 75607, 86408, 108010, 151214, 216020, 302428, 378035, 432040, 529249, 604856, 756070, 1058498, 1512140, 2116996, 2646245, 3024280, 4233992, 5292490, 10584980, 21169960]

約数ペア:

[(1, 21169960), (2, 10584980), (4, 5292490), (5, 4233992), (7, 3024280), (8, 2646245), (10, 2116996), (14, 1512140), (20, 1058498), (28, 756070), (35, 604856), (40, 529249), (49, 432040), (56, 378035), (70, 302428), (98, 216020), (140, 151214), (196, 108010), (245, 86408), (280, 75607), (343, 61720), (392, 54005), (490, 43204), (686, 30860), (980, 21602), (1372, 15430), (1543, 13720), (1715, 12344), (1960, 10801), (2744, 7715), (3086, 6860), (3430, 6172)]