18938480

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{21521}}^1$

素因数の和:21545

約数の個数: 40

約数和(自身を含む): 48037104

約数和(自身を除く): 29098624

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 21521, 43042, 86084, 107605, 172168, 215210, 236731, 344336, 430420, 473462, 860840, 946924, 1183655, 1721680, 1893848, 2367310, 3787696, 4734620, 9469240, 18938480]

約数ペア:

[(1, 18938480), (2, 9469240), (4, 4734620), (5, 3787696), (8, 2367310), (10, 1893848), (11, 1721680), (16, 1183655), (20, 946924), (22, 860840), (40, 473462), (44, 430420), (55, 344336), (80, 236731), (88, 215210), (110, 172168), (176, 107605), (220, 86084), (440, 43042), (880, 21521)]