21178890

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{7591}}^1$

素因数の和:7635

約数の個数: 48

約数和(自身を含む): 56848896

約数和(自身を除く): 35670006

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 31, 45, 62, 90, 93, 155, 186, 279, 310, 465, 558, 930, 1395, 2790, 7591, 15182, 22773, 37955, 45546, 68319, 75910, 113865, 136638, 227730, 235321, 341595, 470642, 683190, 705963, 1176605, 1411926, 2117889, 2353210, 3529815, 4235778, 7059630, 10589445, 21178890]

約数ペア:

[(1, 21178890), (2, 10589445), (3, 7059630), (5, 4235778), (6, 3529815), (9, 2353210), (10, 2117889), (15, 1411926), (18, 1176605), (30, 705963), (31, 683190), (45, 470642), (62, 341595), (90, 235321), (93, 227730), (155, 136638), (186, 113865), (279, 75910), (310, 68319), (465, 45546), (558, 37955), (930, 22773), (1395, 15182), (2790, 7591)]