18401720

素因数分解:

$2^3\times 5^1\times {\mathrm{521}}^1\times {\mathrm{883}}^1$

素因数の和:1415

約数の個数: 32

約数和(自身を含む): 41530320

約数和(自身を除く): 23128600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 521, 883, 1042, 1766, 2084, 2605, 3532, 4168, 4415, 5210, 7064, 8830, 10420, 17660, 20840, 35320, 460043, 920086, 1840172, 2300215, 3680344, 4600430, 9200860, 18401720]

約数ペア:

[(1, 18401720), (2, 9200860), (4, 4600430), (5, 3680344), (8, 2300215), (10, 1840172), (20, 920086), (40, 460043), (521, 35320), (883, 20840), (1042, 17660), (1766, 10420), (2084, 8830), (2605, 7064), (3532, 5210), (4168, 4415)]