18690640

素因数分解:

$2^4\times 5^1\times {\mathrm{167}}^1\times {\mathrm{1399}}^1$

素因数の和:1579

約数の個数: 40

約数和(自身を含む): 43747200

約数和(自身を除く): 25056560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 167, 334, 668, 835, 1336, 1399, 1670, 2672, 2798, 3340, 5596, 6680, 6995, 11192, 13360, 13990, 22384, 27980, 55960, 111920, 233633, 467266, 934532, 1168165, 1869064, 2336330, 3738128, 4672660, 9345320, 18690640]

約数ペア:

[(1, 18690640), (2, 9345320), (4, 4672660), (5, 3738128), (8, 2336330), (10, 1869064), (16, 1168165), (20, 934532), (40, 467266), (80, 233633), (167, 111920), (334, 55960), (668, 27980), (835, 22384), (1336, 13990), (1399, 13360), (1670, 11192), (2672, 6995), (2798, 6680), (3340, 5596)]