21039460

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{4259}}^1$

素因数の和:4300

約数の個数: 48

約数和(自身を含む): 50097600

約数和(自身を除く): 29058140

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 190, 247, 260, 380, 494, 988, 1235, 2470, 4259, 4940, 8518, 17036, 21295, 42590, 55367, 80921, 85180, 110734, 161842, 221468, 276835, 323684, 404605, 553670, 809210, 1051973, 1107340, 1618420, 2103946, 4207892, 5259865, 10519730, 21039460]

約数ペア:

[(1, 21039460), (2, 10519730), (4, 5259865), (5, 4207892), (10, 2103946), (13, 1618420), (19, 1107340), (20, 1051973), (26, 809210), (38, 553670), (52, 404605), (65, 323684), (76, 276835), (95, 221468), (130, 161842), (190, 110734), (247, 85180), (260, 80921), (380, 55367), (494, 42590), (988, 21295), (1235, 17036), (2470, 8518), (4259, 4940)]