20621770

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{73}}^1$

素因数の和:187

約数の個数: 64

約数和(自身を含む): 42293664

約数和(自身を除く): 21671894

約数列:

[1, 2, 5, 10, 13, 26, 41, 53, 65, 73, 82, 106, 130, 146, 205, 265, 365, 410, 530, 533, 689, 730, 949, 1066, 1378, 1898, 2173, 2665, 2993, 3445, 3869, 4346, 4745, 5330, 5986, 6890, 7738, 9490, 10865, 14965, 19345, 21730, 28249, 29930, 38690, 38909, 50297, 56498, 77818, 100594, 141245, 158629, 194545, 251485, 282490, 317258, 389090, 502970, 793145, 1586290, 2062177, 4124354, 10310885, 20621770]

約数ペア:

[(1, 20621770), (2, 10310885), (5, 4124354), (10, 2062177), (13, 1586290), (26, 793145), (41, 502970), (53, 389090), (65, 317258), (73, 282490), (82, 251485), (106, 194545), (130, 158629), (146, 141245), (205, 100594), (265, 77818), (365, 56498), (410, 50297), (530, 38909), (533, 38690), (689, 29930), (730, 28249), (949, 21730), (1066, 19345), (1378, 14965), (1898, 10865), (2173, 9490), (2665, 7738), (2993, 6890), (3445, 5986), (3869, 5330), (4346, 4745)]