81231540

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{8011}}^1$

素因数の和:8049

約数の個数: 72

約数和(自身を含む): 246320928

約数和(自身を除く): 165089388

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 169, 195, 260, 338, 390, 507, 676, 780, 845, 1014, 1690, 2028, 2535, 3380, 5070, 8011, 10140, 16022, 24033, 32044, 40055, 48066, 80110, 96132, 104143, 120165, 160220, 208286, 240330, 312429, 416572, 480660, 520715, 624858, 1041430, 1249716, 1353859, 1562145, 2082860, 2707718, 3124290, 4061577, 5415436, 6248580, 6769295, 8123154, 13538590, 16246308, 20307885, 27077180, 40615770, 81231540]

約数ペア:

[(1, 81231540), (2, 40615770), (3, 27077180), (4, 20307885), (5, 16246308), (6, 13538590), (10, 8123154), (12, 6769295), (13, 6248580), (15, 5415436), (20, 4061577), (26, 3124290), (30, 2707718), (39, 2082860), (52, 1562145), (60, 1353859), (65, 1249716), (78, 1041430), (130, 624858), (156, 520715), (169, 480660), (195, 416572), (260, 312429), (338, 240330), (390, 208286), (507, 160220), (676, 120165), (780, 104143), (845, 96132), (1014, 80110), (1690, 48066), (2028, 40055), (2535, 32044), (3380, 24033), (5070, 16022), (8011, 10140)]