20478668

素因数分解:

$2^2\times 7^2\times {\mathrm{163}}^1\times {\mathrm{641}}^1$

素因数の和:822

約数の個数: 36

約数和(自身を含む): 42009912

約数和(自身を除く): 21531244

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 163, 196, 326, 641, 652, 1141, 1282, 2282, 2564, 4487, 4564, 7987, 8974, 15974, 17948, 31409, 31948, 62818, 104483, 125636, 208966, 417932, 731381, 1462762, 2925524, 5119667, 10239334, 20478668]

約数ペア:

[(1, 20478668), (2, 10239334), (4, 5119667), (7, 2925524), (14, 1462762), (28, 731381), (49, 417932), (98, 208966), (163, 125636), (196, 104483), (326, 62818), (641, 31948), (652, 31409), (1141, 17948), (1282, 15974), (2282, 8974), (2564, 7987), (4487, 4564)]