66628420

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{239}}^1\times {\mathrm{263}}^1$

素因数の和:564

約数の個数: 48

約数和(自身を含む): 143700480

約数和(自身を除く): 77072060

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 212, 239, 263, 265, 478, 526, 530, 956, 1052, 1060, 1195, 1315, 2390, 2630, 4780, 5260, 12667, 13939, 25334, 27878, 50668, 55756, 62857, 63335, 69695, 125714, 126670, 139390, 251428, 253340, 278780, 314285, 628570, 1257140, 3331421, 6662842, 13325684, 16657105, 33314210, 66628420]

約数ペア:

[(1, 66628420), (2, 33314210), (4, 16657105), (5, 13325684), (10, 6662842), (20, 3331421), (53, 1257140), (106, 628570), (212, 314285), (239, 278780), (263, 253340), (265, 251428), (478, 139390), (526, 126670), (530, 125714), (956, 69695), (1052, 63335), (1060, 62857), (1195, 55756), (1315, 50668), (2390, 27878), (2630, 25334), (4780, 13939), (5260, 12667)]