65281840

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{1531}}^1$

素因数の和:1598

約数の個数: 80

約数和(自身を含む): 167551776

約数和(自身を除く): 102269936

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 41, 52, 65, 80, 82, 104, 130, 164, 205, 208, 260, 328, 410, 520, 533, 656, 820, 1040, 1066, 1531, 1640, 2132, 2665, 3062, 3280, 4264, 5330, 6124, 7655, 8528, 10660, 12248, 15310, 19903, 21320, 24496, 30620, 39806, 42640, 61240, 62771, 79612, 99515, 122480, 125542, 159224, 199030, 251084, 313855, 318448, 398060, 502168, 627710, 796120, 816023, 1004336, 1255420, 1592240, 1632046, 2510840, 3264092, 4080115, 5021680, 6528184, 8160230, 13056368, 16320460, 32640920, 65281840]

約数ペア:

[(1, 65281840), (2, 32640920), (4, 16320460), (5, 13056368), (8, 8160230), (10, 6528184), (13, 5021680), (16, 4080115), (20, 3264092), (26, 2510840), (40, 1632046), (41, 1592240), (52, 1255420), (65, 1004336), (80, 816023), (82, 796120), (104, 627710), (130, 502168), (164, 398060), (205, 318448), (208, 313855), (260, 251084), (328, 199030), (410, 159224), (520, 125542), (533, 122480), (656, 99515), (820, 79612), (1040, 62771), (1066, 61240), (1531, 42640), (1640, 39806), (2132, 30620), (2665, 24496), (3062, 21320), (3280, 19903), (4264, 15310), (5330, 12248), (6124, 10660), (7655, 8528)]