21107708

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{157}}^1$

素因数の和:270

約数の個数: 48

約数和(自身を含む): 41143200

約数和(自身を除く): 20035492

約数列:

[1, 2, 4, 19, 29, 38, 58, 61, 76, 116, 122, 157, 244, 314, 551, 628, 1102, 1159, 1769, 2204, 2318, 2983, 3538, 4553, 4636, 5966, 7076, 9106, 9577, 11932, 18212, 19154, 33611, 38308, 67222, 86507, 134444, 173014, 181963, 277733, 346028, 363926, 555466, 727852, 1110932, 5276927, 10553854, 21107708]

約数ペア:

[(1, 21107708), (2, 10553854), (4, 5276927), (19, 1110932), (29, 727852), (38, 555466), (58, 363926), (61, 346028), (76, 277733), (116, 181963), (122, 173014), (157, 134444), (244, 86507), (314, 67222), (551, 38308), (628, 33611), (1102, 19154), (1159, 18212), (1769, 11932), (2204, 9577), (2318, 9106), (2983, 7076), (3538, 5966), (4553, 4636)]