81268020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{6359}}^1$

素因数の和:6445

約数の個数: 72

約数和(自身を含む): 250024320

約数和(自身を除く): 168756300

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 71, 90, 142, 180, 213, 284, 355, 426, 639, 710, 852, 1065, 1278, 1420, 2130, 2556, 3195, 4260, 6359, 6390, 12718, 12780, 19077, 25436, 31795, 38154, 57231, 63590, 76308, 95385, 114462, 127180, 190770, 228924, 286155, 381540, 451489, 572310, 902978, 1144620, 1354467, 1805956, 2257445, 2708934, 4063401, 4514890, 5417868, 6772335, 8126802, 9029780, 13544670, 16253604, 20317005, 27089340, 40634010, 81268020]

約数ペア:

[(1, 81268020), (2, 40634010), (3, 27089340), (4, 20317005), (5, 16253604), (6, 13544670), (9, 9029780), (10, 8126802), (12, 6772335), (15, 5417868), (18, 4514890), (20, 4063401), (30, 2708934), (36, 2257445), (45, 1805956), (60, 1354467), (71, 1144620), (90, 902978), (142, 572310), (180, 451489), (213, 381540), (284, 286155), (355, 228924), (426, 190770), (639, 127180), (710, 114462), (852, 95385), (1065, 76308), (1278, 63590), (1420, 57231), (2130, 38154), (2556, 31795), (3195, 25436), (4260, 19077), (6359, 12780), (6390, 12718)]