21967140

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{28163}}^1$

素因数の和:28188

約数の個数: 48

約数和(自身を含む): 66241728

約数和(自身を除く): 44274588

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 28163, 56326, 84489, 112652, 140815, 168978, 281630, 337956, 366119, 422445, 563260, 732238, 844890, 1098357, 1464476, 1689780, 1830595, 2196714, 3661190, 4393428, 5491785, 7322380, 10983570, 21967140]

約数ペア:

[(1, 21967140), (2, 10983570), (3, 7322380), (4, 5491785), (5, 4393428), (6, 3661190), (10, 2196714), (12, 1830595), (13, 1689780), (15, 1464476), (20, 1098357), (26, 844890), (30, 732238), (39, 563260), (52, 422445), (60, 366119), (65, 337956), (78, 281630), (130, 168978), (156, 140815), (195, 112652), (260, 84489), (390, 56326), (780, 28163)]