21209680

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{11527}}^1$

素因数の和:11563

約数の個数: 40

約数和(自身を含む): 51460992

約数和(自身を除く): 30251312

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 80, 92, 115, 184, 230, 368, 460, 920, 1840, 11527, 23054, 46108, 57635, 92216, 115270, 184432, 230540, 265121, 461080, 530242, 922160, 1060484, 1325605, 2120968, 2651210, 4241936, 5302420, 10604840, 21209680]

約数ペア:

[(1, 21209680), (2, 10604840), (4, 5302420), (5, 4241936), (8, 2651210), (10, 2120968), (16, 1325605), (20, 1060484), (23, 922160), (40, 530242), (46, 461080), (80, 265121), (92, 230540), (115, 184432), (184, 115270), (230, 92216), (368, 57635), (460, 46108), (920, 23054), (1840, 11527)]