20267660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2039}}^1$

素因数の和:2126

約数の個数: 48

約数和(自身を含む): 49351680

約数和(自身を除く): 29084020

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 71, 140, 142, 284, 355, 497, 710, 994, 1420, 1988, 2039, 2485, 4078, 4970, 8156, 9940, 10195, 14273, 20390, 28546, 40780, 57092, 71365, 142730, 144769, 285460, 289538, 579076, 723845, 1013383, 1447690, 2026766, 2895380, 4053532, 5066915, 10133830, 20267660]

約数ペア:

[(1, 20267660), (2, 10133830), (4, 5066915), (5, 4053532), (7, 2895380), (10, 2026766), (14, 1447690), (20, 1013383), (28, 723845), (35, 579076), (70, 289538), (71, 285460), (140, 144769), (142, 142730), (284, 71365), (355, 57092), (497, 40780), (710, 28546), (994, 20390), (1420, 14273), (1988, 10195), (2039, 9940), (2485, 8156), (4078, 4970)]