20521690

素因数分解:

$2^1\times 5^1\times 7^3\times {\mathrm{31}}^1\times {\mathrm{193}}^1$

素因数の和:252

約数の個数: 64

約数和(自身を含む): 44697600

約数和(自身を除く): 24175910

約数列:

[1, 2, 5, 7, 10, 14, 31, 35, 49, 62, 70, 98, 155, 193, 217, 245, 310, 343, 386, 434, 490, 686, 965, 1085, 1351, 1519, 1715, 1930, 2170, 2702, 3038, 3430, 5983, 6755, 7595, 9457, 10633, 11966, 13510, 15190, 18914, 21266, 29915, 41881, 47285, 53165, 59830, 66199, 83762, 94570, 106330, 132398, 209405, 293167, 330995, 418810, 586334, 661990, 1465835, 2052169, 2931670, 4104338, 10260845, 20521690]

約数ペア:

[(1, 20521690), (2, 10260845), (5, 4104338), (7, 2931670), (10, 2052169), (14, 1465835), (31, 661990), (35, 586334), (49, 418810), (62, 330995), (70, 293167), (98, 209405), (155, 132398), (193, 106330), (217, 94570), (245, 83762), (310, 66199), (343, 59830), (386, 53165), (434, 47285), (490, 41881), (686, 29915), (965, 21266), (1085, 18914), (1351, 15190), (1519, 13510), (1715, 11966), (1930, 10633), (2170, 9457), (2702, 7595), (3038, 6755), (3430, 5983)]