18372440

素因数分解:

$2^3\times 5^1\times {\mathrm{421}}^1\times {\mathrm{1091}}^1$

素因数の和:1523

約数の個数: 32

約数和(自身を含む): 41474160

約数和(自身を除く): 23101720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 421, 842, 1091, 1684, 2105, 2182, 3368, 4210, 4364, 5455, 8420, 8728, 10910, 16840, 21820, 43640, 459311, 918622, 1837244, 2296555, 3674488, 4593110, 9186220, 18372440]

約数ペア:

[(1, 18372440), (2, 9186220), (4, 4593110), (5, 3674488), (8, 2296555), (10, 1837244), (20, 918622), (40, 459311), (421, 43640), (842, 21820), (1091, 16840), (1684, 10910), (2105, 8728), (2182, 8420), (3368, 5455), (4210, 4364)]