20779460

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{229}}^1\times {\mathrm{349}}^1$

素因数の和:600

約数の個数: 48

約数和(自身を含む): 47334000

約数和(自身を除く): 26554540

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 229, 260, 349, 458, 698, 916, 1145, 1396, 1745, 2290, 2977, 3490, 4537, 4580, 5954, 6980, 9074, 11908, 14885, 18148, 22685, 29770, 45370, 59540, 79921, 90740, 159842, 319684, 399605, 799210, 1038973, 1598420, 2077946, 4155892, 5194865, 10389730, 20779460]

約数ペア:

[(1, 20779460), (2, 10389730), (4, 5194865), (5, 4155892), (10, 2077946), (13, 1598420), (20, 1038973), (26, 799210), (52, 399605), (65, 319684), (130, 159842), (229, 90740), (260, 79921), (349, 59540), (458, 45370), (698, 29770), (916, 22685), (1145, 18148), (1396, 14885), (1745, 11908), (2290, 9074), (2977, 6980), (3490, 5954), (4537, 4580)]