20849520

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{109}}^1\times {\mathrm{797}}^1$

素因数の和:922

約数の個数: 80

約数和(自身を含む): 65308320

約数和(自身を除く): 44458800

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 109, 120, 218, 240, 327, 436, 545, 654, 797, 872, 1090, 1308, 1594, 1635, 1744, 2180, 2391, 2616, 3188, 3270, 3985, 4360, 4782, 5232, 6376, 6540, 7970, 8720, 9564, 11955, 12752, 13080, 15940, 19128, 23910, 26160, 31880, 38256, 47820, 63760, 86873, 95640, 173746, 191280, 260619, 347492, 434365, 521238, 694984, 868730, 1042476, 1303095, 1389968, 1737460, 2084952, 2606190, 3474920, 4169904, 5212380, 6949840, 10424760, 20849520]

約数ペア:

[(1, 20849520), (2, 10424760), (3, 6949840), (4, 5212380), (5, 4169904), (6, 3474920), (8, 2606190), (10, 2084952), (12, 1737460), (15, 1389968), (16, 1303095), (20, 1042476), (24, 868730), (30, 694984), (40, 521238), (48, 434365), (60, 347492), (80, 260619), (109, 191280), (120, 173746), (218, 95640), (240, 86873), (327, 63760), (436, 47820), (545, 38256), (654, 31880), (797, 26160), (872, 23910), (1090, 19128), (1308, 15940), (1594, 13080), (1635, 12752), (1744, 11955), (2180, 9564), (2391, 8720), (2616, 7970), (3188, 6540), (3270, 6376), (3985, 5232), (4360, 4782)]