19781540

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{797}}^1$

素因数の和:896

約数の個数: 48

約数和(自身を含む): 44643312

約数和(自身を除く): 24861772

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 73, 85, 146, 170, 292, 340, 365, 730, 797, 1241, 1460, 1594, 2482, 3188, 3985, 4964, 6205, 7970, 12410, 13549, 15940, 24820, 27098, 54196, 58181, 67745, 116362, 135490, 232724, 270980, 290905, 581810, 989077, 1163620, 1978154, 3956308, 4945385, 9890770, 19781540]

約数ペア:

[(1, 19781540), (2, 9890770), (4, 4945385), (5, 3956308), (10, 1978154), (17, 1163620), (20, 989077), (34, 581810), (68, 290905), (73, 270980), (85, 232724), (146, 135490), (170, 116362), (292, 67745), (340, 58181), (365, 54196), (730, 27098), (797, 24820), (1241, 15940), (1460, 13549), (1594, 12410), (2482, 7970), (3188, 6205), (3985, 4964)]