21875360

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^2\times {\mathrm{809}}^1$

素因数の和:850

約数の個数: 72

約数和(自身を含む): 56030940

約数和(自身を除く): 34155580

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 169, 208, 260, 338, 416, 520, 676, 809, 845, 1040, 1352, 1618, 1690, 2080, 2704, 3236, 3380, 4045, 5408, 6472, 6760, 8090, 10517, 12944, 13520, 16180, 21034, 25888, 27040, 32360, 42068, 52585, 64720, 84136, 105170, 129440, 136721, 168272, 210340, 273442, 336544, 420680, 546884, 683605, 841360, 1093768, 1367210, 1682720, 2187536, 2734420, 4375072, 5468840, 10937680, 21875360]

約数ペア:

[(1, 21875360), (2, 10937680), (4, 5468840), (5, 4375072), (8, 2734420), (10, 2187536), (13, 1682720), (16, 1367210), (20, 1093768), (26, 841360), (32, 683605), (40, 546884), (52, 420680), (65, 336544), (80, 273442), (104, 210340), (130, 168272), (160, 136721), (169, 129440), (208, 105170), (260, 84136), (338, 64720), (416, 52585), (520, 42068), (676, 32360), (809, 27040), (845, 25888), (1040, 21034), (1352, 16180), (1618, 13520), (1690, 12944), (2080, 10517), (2704, 8090), (3236, 6760), (3380, 6472), (4045, 5408)]