1999580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{149}}^1$

素因数の和:230

約数の個数: 48

約数和(自身を含む): 4687200

約数和(自身を除く): 2687620

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 61, 110, 122, 149, 220, 244, 298, 305, 596, 610, 671, 745, 1220, 1342, 1490, 1639, 2684, 2980, 3278, 3355, 6556, 6710, 8195, 9089, 13420, 16390, 18178, 32780, 36356, 45445, 90890, 99979, 181780, 199958, 399916, 499895, 999790, 1999580]

約数ペア:

[(1, 1999580), (2, 999790), (4, 499895), (5, 399916), (10, 199958), (11, 181780), (20, 99979), (22, 90890), (44, 45445), (55, 36356), (61, 32780), (110, 18178), (122, 16390), (149, 13420), (220, 9089), (244, 8195), (298, 6710), (305, 6556), (596, 3355), (610, 3278), (671, 2980), (745, 2684), (1220, 1639), (1342, 1490)]