18740920

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{191}}^1\times {\mathrm{223}}^1$

素因数の和:436

約数の個数: 64

約数和(自身を含む): 46448640

約数和(自身を除く): 27707720

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 191, 220, 223, 382, 440, 446, 764, 892, 955, 1115, 1528, 1784, 1910, 2101, 2230, 2453, 3820, 4202, 4460, 4906, 7640, 8404, 8920, 9812, 10505, 12265, 16808, 19624, 21010, 24530, 42020, 42593, 49060, 84040, 85186, 98120, 170372, 212965, 340744, 425930, 468523, 851860, 937046, 1703720, 1874092, 2342615, 3748184, 4685230, 9370460, 18740920]

約数ペア:

[(1, 18740920), (2, 9370460), (4, 4685230), (5, 3748184), (8, 2342615), (10, 1874092), (11, 1703720), (20, 937046), (22, 851860), (40, 468523), (44, 425930), (55, 340744), (88, 212965), (110, 170372), (191, 98120), (220, 85186), (223, 84040), (382, 49060), (440, 42593), (446, 42020), (764, 24530), (892, 21010), (955, 19624), (1115, 16808), (1528, 12265), (1784, 10505), (1910, 9812), (2101, 8920), (2230, 8404), (2453, 7640), (3820, 4906), (4202, 4460)]