81219775

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1879}}^1$

素因数の和:1928

約数の個数: 48

約数和(自身を含む): 130547200

約数和(自身を除く): 49327425

約数列:

[1, 5, 7, 13, 19, 25, 35, 65, 91, 95, 133, 175, 247, 325, 455, 475, 665, 1235, 1729, 1879, 2275, 3325, 6175, 8645, 9395, 13153, 24427, 35701, 43225, 46975, 65765, 122135, 170989, 178505, 249907, 328825, 464113, 610675, 854945, 892525, 1249535, 2320565, 3248791, 4274725, 6247675, 11602825, 16243955, 81219775]

約数ペア:

[(1, 81219775), (5, 16243955), (7, 11602825), (13, 6247675), (19, 4274725), (25, 3248791), (35, 2320565), (65, 1249535), (91, 892525), (95, 854945), (133, 610675), (175, 464113), (247, 328825), (325, 249907), (455, 178505), (475, 170989), (665, 122135), (1235, 65765), (1729, 46975), (1879, 43225), (2275, 35701), (3325, 24427), (6175, 13153), (8645, 9395)]