21688680

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{13903}}^1$

素因数の和:13930

約数の個数: 64

約数和(自身を含む): 70076160

約数和(自身を除く): 48387480

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 104, 120, 130, 156, 195, 260, 312, 390, 520, 780, 1560, 13903, 27806, 41709, 55612, 69515, 83418, 111224, 139030, 166836, 180739, 208545, 278060, 333672, 361478, 417090, 542217, 556120, 722956, 834180, 903695, 1084434, 1445912, 1668360, 1807390, 2168868, 2711085, 3614780, 4337736, 5422170, 7229560, 10844340, 21688680]

約数ペア:

[(1, 21688680), (2, 10844340), (3, 7229560), (4, 5422170), (5, 4337736), (6, 3614780), (8, 2711085), (10, 2168868), (12, 1807390), (13, 1668360), (15, 1445912), (20, 1084434), (24, 903695), (26, 834180), (30, 722956), (39, 556120), (40, 542217), (52, 417090), (60, 361478), (65, 333672), (78, 278060), (104, 208545), (120, 180739), (130, 166836), (156, 139030), (195, 111224), (260, 83418), (312, 69515), (390, 55612), (520, 41709), (780, 27806), (1560, 13903)]