20122720

素因数分解:

$2^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{4057}}^1$

素因数の和:4103

約数の個数: 48

約数和(自身を含む): 49085568

約数和(自身を除く): 28962848

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 80, 124, 155, 160, 248, 310, 496, 620, 992, 1240, 2480, 4057, 4960, 8114, 16228, 20285, 32456, 40570, 64912, 81140, 125767, 129824, 162280, 251534, 324560, 503068, 628835, 649120, 1006136, 1257670, 2012272, 2515340, 4024544, 5030680, 10061360, 20122720]

約数ペア:

[(1, 20122720), (2, 10061360), (4, 5030680), (5, 4024544), (8, 2515340), (10, 2012272), (16, 1257670), (20, 1006136), (31, 649120), (32, 628835), (40, 503068), (62, 324560), (80, 251534), (124, 162280), (155, 129824), (160, 125767), (248, 81140), (310, 64912), (496, 40570), (620, 32456), (992, 20285), (1240, 16228), (2480, 8114), (4057, 4960)]