20920040

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{16871}}^1$

素因数の和:16913

約数の個数: 32

約数和(自身を含む): 48591360

約数和(自身を除く): 27671320

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 16871, 33742, 67484, 84355, 134968, 168710, 337420, 523001, 674840, 1046002, 2092004, 2615005, 4184008, 5230010, 10460020, 20920040]

約数ペア:

[(1, 20920040), (2, 10460020), (4, 5230010), (5, 4184008), (8, 2615005), (10, 2092004), (20, 1046002), (31, 674840), (40, 523001), (62, 337420), (124, 168710), (155, 134968), (248, 84355), (310, 67484), (620, 33742), (1240, 16871)]