21687890

素因数分解:

$2^1\times 5^1\times 7^3\times {\mathrm{6323}}^1$

素因数の和:6351

約数の個数: 32

約数和(自身を含む): 45532800

約数和(自身を除く): 23844910

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 343, 490, 686, 1715, 3430, 6323, 12646, 31615, 44261, 63230, 88522, 221305, 309827, 442610, 619654, 1549135, 2168789, 3098270, 4337578, 10843945, 21687890]

約数ペア:

[(1, 21687890), (2, 10843945), (5, 4337578), (7, 3098270), (10, 2168789), (14, 1549135), (35, 619654), (49, 442610), (70, 309827), (98, 221305), (245, 88522), (343, 63230), (490, 44261), (686, 31615), (1715, 12646), (3430, 6323)]