21753320

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{331}}^1$

素因数の和:426

約数の個数: 64

約数和(自身を含む): 51632640

約数和(自身を除く): 29879320

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 53, 62, 106, 124, 155, 212, 248, 265, 310, 331, 424, 530, 620, 662, 1060, 1240, 1324, 1643, 1655, 2120, 2648, 3286, 3310, 6572, 6620, 8215, 10261, 13144, 13240, 16430, 17543, 20522, 32860, 35086, 41044, 51305, 65720, 70172, 82088, 87715, 102610, 140344, 175430, 205220, 350860, 410440, 543833, 701720, 1087666, 2175332, 2719165, 4350664, 5438330, 10876660, 21753320]

約数ペア:

[(1, 21753320), (2, 10876660), (4, 5438330), (5, 4350664), (8, 2719165), (10, 2175332), (20, 1087666), (31, 701720), (40, 543833), (53, 410440), (62, 350860), (106, 205220), (124, 175430), (155, 140344), (212, 102610), (248, 87715), (265, 82088), (310, 70172), (331, 65720), (424, 51305), (530, 41044), (620, 35086), (662, 32860), (1060, 20522), (1240, 17543), (1324, 16430), (1643, 13240), (1655, 13144), (2120, 10261), (2648, 8215), (3286, 6620), (3310, 6572)]