20995240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{167}}^1\times {\mathrm{449}}^1$

素因数の和:634

約数の個数: 64

約数和(自身を含む): 54432000

約数和(自身を除く): 33436760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 167, 280, 334, 449, 668, 835, 898, 1169, 1336, 1670, 1796, 2245, 2338, 3143, 3340, 3592, 4490, 4676, 5845, 6286, 6680, 8980, 9352, 11690, 12572, 15715, 17960, 23380, 25144, 31430, 46760, 62860, 74983, 125720, 149966, 299932, 374915, 524881, 599864, 749830, 1049762, 1499660, 2099524, 2624405, 2999320, 4199048, 5248810, 10497620, 20995240]

約数ペア:

[(1, 20995240), (2, 10497620), (4, 5248810), (5, 4199048), (7, 2999320), (8, 2624405), (10, 2099524), (14, 1499660), (20, 1049762), (28, 749830), (35, 599864), (40, 524881), (56, 374915), (70, 299932), (140, 149966), (167, 125720), (280, 74983), (334, 62860), (449, 46760), (668, 31430), (835, 25144), (898, 23380), (1169, 17960), (1336, 15715), (1670, 12572), (1796, 11690), (2245, 9352), (2338, 8980), (3143, 6680), (3340, 6286), (3592, 5845), (4490, 4676)]