20121950

素因数分解:

$2^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{359}}^1$

素因数の和:449

約数の個数: 48

約数和(自身を含む): 40176000

約数和(自身を除く): 20054050

約数列:

[1, 2, 5, 10, 19, 25, 38, 50, 59, 95, 118, 190, 295, 359, 475, 590, 718, 950, 1121, 1475, 1795, 2242, 2950, 3590, 5605, 6821, 8975, 11210, 13642, 17950, 21181, 28025, 34105, 42362, 56050, 68210, 105905, 170525, 211810, 341050, 402439, 529525, 804878, 1059050, 2012195, 4024390, 10060975, 20121950]

約数ペア:

[(1, 20121950), (2, 10060975), (5, 4024390), (10, 2012195), (19, 1059050), (25, 804878), (38, 529525), (50, 402439), (59, 341050), (95, 211810), (118, 170525), (190, 105905), (295, 68210), (359, 56050), (475, 42362), (590, 34105), (718, 28025), (950, 21181), (1121, 17950), (1475, 13642), (1795, 11210), (2242, 8975), (2950, 6821), (3590, 5605)]