21364480

素因数分解:

$2^8\times 5^1\times {\mathrm{16691}}^1$

素因数の和:16712

約数の個数: 36

約数和(自身を含む): 51177672

約数和(自身を除く): 29813192

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 16691, 33382, 66764, 83455, 133528, 166910, 267056, 333820, 534112, 667640, 1068224, 1335280, 2136448, 2670560, 4272896, 5341120, 10682240, 21364480]

約数ペア:

[(1, 21364480), (2, 10682240), (4, 5341120), (5, 4272896), (8, 2670560), (10, 2136448), (16, 1335280), (20, 1068224), (32, 667640), (40, 534112), (64, 333820), (80, 267056), (128, 166910), (160, 133528), (256, 83455), (320, 66764), (640, 33382), (1280, 16691)]