19650980

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{1993}}^1$

素因数の和:2048

約数の個数: 48

約数和(自身を含む): 45223920

約数和(自身を除く): 25572940

約数列:

[1, 2, 4, 5, 10, 17, 20, 29, 34, 58, 68, 85, 116, 145, 170, 290, 340, 493, 580, 986, 1972, 1993, 2465, 3986, 4930, 7972, 9860, 9965, 19930, 33881, 39860, 57797, 67762, 115594, 135524, 169405, 231188, 288985, 338810, 577970, 677620, 982549, 1155940, 1965098, 3930196, 4912745, 9825490, 19650980]

約数ペア:

[(1, 19650980), (2, 9825490), (4, 4912745), (5, 3930196), (10, 1965098), (17, 1155940), (20, 982549), (29, 677620), (34, 577970), (58, 338810), (68, 288985), (85, 231188), (116, 169405), (145, 135524), (170, 115594), (290, 67762), (340, 57797), (493, 39860), (580, 33881), (986, 19930), (1972, 9965), (1993, 9860), (2465, 7972), (3986, 4930)]