18187760

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{3727}}^1$

素因数の和:3801

約数の個数: 40

約数和(自身を含む): 42991296

約数和(自身を除く): 24803536

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 244, 305, 488, 610, 976, 1220, 2440, 3727, 4880, 7454, 14908, 18635, 29816, 37270, 59632, 74540, 149080, 227347, 298160, 454694, 909388, 1136735, 1818776, 2273470, 3637552, 4546940, 9093880, 18187760]

約数ペア:

[(1, 18187760), (2, 9093880), (4, 4546940), (5, 3637552), (8, 2273470), (10, 1818776), (16, 1136735), (20, 909388), (40, 454694), (61, 298160), (80, 227347), (122, 149080), (244, 74540), (305, 59632), (488, 37270), (610, 29816), (976, 18635), (1220, 14908), (2440, 7454), (3727, 4880)]