18249980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{2137}}^1$

素因数の和:2214

約数の個数: 48

約数和(自身を含む): 44538816

約数和(自身を除く): 26288836

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 61, 70, 122, 140, 244, 305, 427, 610, 854, 1220, 1708, 2135, 2137, 4270, 4274, 8540, 8548, 10685, 14959, 21370, 29918, 42740, 59836, 74795, 130357, 149590, 260714, 299180, 521428, 651785, 912499, 1303570, 1824998, 2607140, 3649996, 4562495, 9124990, 18249980]

約数ペア:

[(1, 18249980), (2, 9124990), (4, 4562495), (5, 3649996), (7, 2607140), (10, 1824998), (14, 1303570), (20, 912499), (28, 651785), (35, 521428), (61, 299180), (70, 260714), (122, 149590), (140, 130357), (244, 74795), (305, 59836), (427, 42740), (610, 29918), (854, 21370), (1220, 14959), (1708, 10685), (2135, 8548), (2137, 8540), (4270, 4274)]