21839740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{4421}}^1$

素因数の和:4462

約数の個数: 48

約数和(自身を含む): 52002720

約数和(自身を除く): 30162980

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, 4421, 4940, 8842, 17684, 22105, 44210, 57473, 83999, 88420, 114946, 167998, 229892, 287365, 335996, 419995, 574730, 839990, 1091987, 1149460, 1679980, 2183974, 4367948, 5459935, 10919870, 21839740]

約数ペア:

[(1, 21839740), (2, 10919870), (4, 5459935), (5, 4367948), (10, 2183974), (13, 1679980), (19, 1149460), (20, 1091987), (26, 839990), (38, 574730), (52, 419995), (65, 335996), (76, 287365), (95, 229892), (130, 167998), (190, 114946), (247, 88420), (260, 83999), (380, 57473), (494, 44210), (988, 22105), (1235, 17684), (2470, 8842), (4421, 4940)]