261620780

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{571}}^1\times {\mathrm{739}}^1$

素因数の和:1350

約数の個数: 48

約数和(自身を含む): 568888320

約数和(自身を除く): 307267540

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 571, 620, 739, 1142, 1478, 2284, 2855, 2956, 3695, 5710, 7390, 11420, 14780, 17701, 22909, 35402, 45818, 70804, 88505, 91636, 114545, 177010, 229090, 354020, 421969, 458180, 843938, 1687876, 2109845, 4219690, 8439380, 13081039, 26162078, 52324156, 65405195, 130810390, 261620780]

約数ペア:

[(1, 261620780), (2, 130810390), (4, 65405195), (5, 52324156), (10, 26162078), (20, 13081039), (31, 8439380), (62, 4219690), (124, 2109845), (155, 1687876), (310, 843938), (571, 458180), (620, 421969), (739, 354020), (1142, 229090), (1478, 177010), (2284, 114545), (2855, 91636), (2956, 88505), (3695, 70804), (5710, 45818), (7390, 35402), (11420, 22909), (14780, 17701)]