21611080

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{521}}^1$

素因数の和:610

約数の個数: 64

約数和(自身を含む): 52429680

約数和(自身を除く): 30818600

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 61, 68, 85, 122, 136, 170, 244, 305, 340, 488, 521, 610, 680, 1037, 1042, 1220, 2074, 2084, 2440, 2605, 4148, 4168, 5185, 5210, 8296, 8857, 10370, 10420, 17714, 20740, 20840, 31781, 35428, 41480, 44285, 63562, 70856, 88570, 127124, 158905, 177140, 254248, 317810, 354280, 540277, 635620, 1080554, 1271240, 2161108, 2701385, 4322216, 5402770, 10805540, 21611080]

約数ペア:

[(1, 21611080), (2, 10805540), (4, 5402770), (5, 4322216), (8, 2701385), (10, 2161108), (17, 1271240), (20, 1080554), (34, 635620), (40, 540277), (61, 354280), (68, 317810), (85, 254248), (122, 177140), (136, 158905), (170, 127124), (244, 88570), (305, 70856), (340, 63562), (488, 44285), (521, 41480), (610, 35428), (680, 31781), (1037, 20840), (1042, 20740), (1220, 17714), (2074, 10420), (2084, 10370), (2440, 8857), (2605, 8296), (4148, 5210), (4168, 5185)]