1780987640

素因数分解:

$2^3\times 5^1\times {\mathrm{1973}}^1\times {\mathrm{22567}}^1$

素因数の和:24551

約数の個数: 32

約数和(自身を含む): 4009430880

約数和(自身を除く): 2228443240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1973, 3946, 7892, 9865, 15784, 19730, 22567, 39460, 45134, 78920, 90268, 112835, 180536, 225670, 451340, 902680, 44524691, 89049382, 178098764, 222623455, 356197528, 445246910, 890493820, 1780987640]

約数ペア:

[(1, 1780987640), (2, 890493820), (4, 445246910), (5, 356197528), (8, 222623455), (10, 178098764), (20, 89049382), (40, 44524691), (1973, 902680), (3946, 451340), (7892, 225670), (9865, 180536), (15784, 112835), (19730, 90268), (22567, 78920), (39460, 45134)]