20849985

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{1229}}^1$

素因数の和:1282

約数の個数: 48

約数和(自身を含む): 40294800

約数和(自身を除く): 19444815

約数列:

[1, 3, 5, 9, 13, 15, 29, 39, 45, 65, 87, 117, 145, 195, 261, 377, 435, 585, 1131, 1229, 1305, 1885, 3393, 3687, 5655, 6145, 11061, 15977, 16965, 18435, 35641, 47931, 55305, 79885, 106923, 143793, 178205, 239655, 320769, 463333, 534615, 718965, 1389999, 1603845, 2316665, 4169997, 6949995, 20849985]

約数ペア:

[(1, 20849985), (3, 6949995), (5, 4169997), (9, 2316665), (13, 1603845), (15, 1389999), (29, 718965), (39, 534615), (45, 463333), (65, 320769), (87, 239655), (117, 178205), (145, 143793), (195, 106923), (261, 79885), (377, 55305), (435, 47931), (585, 35641), (1131, 18435), (1229, 16965), (1305, 15977), (1885, 11061), (3393, 6145), (3687, 5655)]