18005420

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{113}}^1\times {\mathrm{257}}^1$

素因数の和:410

約数の個数: 48

約数和(自身を含む): 39529728

約数和(自身を除く): 21524308

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 113, 124, 155, 226, 257, 310, 452, 514, 565, 620, 1028, 1130, 1285, 2260, 2570, 3503, 5140, 7006, 7967, 14012, 15934, 17515, 29041, 31868, 35030, 39835, 58082, 70060, 79670, 116164, 145205, 159340, 290410, 580820, 900271, 1800542, 3601084, 4501355, 9002710, 18005420]

約数ペア:

[(1, 18005420), (2, 9002710), (4, 4501355), (5, 3601084), (10, 1800542), (20, 900271), (31, 580820), (62, 290410), (113, 159340), (124, 145205), (155, 116164), (226, 79670), (257, 70060), (310, 58082), (452, 39835), (514, 35030), (565, 31868), (620, 29041), (1028, 17515), (1130, 15934), (1285, 14012), (2260, 7967), (2570, 7006), (3503, 5140)]