20291720

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{12373}}^1$

素因数の和:12425

約数の個数: 32

約数和(自身を含む): 46773720

約数和(自身を除く): 26482000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 12373, 24746, 49492, 61865, 98984, 123730, 247460, 494920, 507293, 1014586, 2029172, 2536465, 4058344, 5072930, 10145860, 20291720]

約数ペア:

[(1, 20291720), (2, 10145860), (4, 5072930), (5, 4058344), (8, 2536465), (10, 2029172), (20, 1014586), (40, 507293), (41, 494920), (82, 247460), (164, 123730), (205, 98984), (328, 61865), (410, 49492), (820, 24746), (1640, 12373)]