21108438

素因数分解:

$2^1\times 3^5\times {\mathrm{13}}^2\times {\mathrm{257}}^1$

素因数の和:300

約数の個数: 72

約数和(自身を含む): 51557688

約数和(自身を除く): 30449250

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 27, 39, 54, 78, 81, 117, 162, 169, 234, 243, 257, 338, 351, 486, 507, 514, 702, 771, 1014, 1053, 1521, 1542, 2106, 2313, 3042, 3159, 3341, 4563, 4626, 6318, 6682, 6939, 9126, 10023, 13689, 13878, 20046, 20817, 27378, 30069, 41067, 41634, 43433, 60138, 62451, 82134, 86866, 90207, 124902, 130299, 180414, 260598, 270621, 390897, 541242, 781794, 811863, 1172691, 1623726, 2345382, 3518073, 7036146, 10554219, 21108438]

約数ペア:

[(1, 21108438), (2, 10554219), (3, 7036146), (6, 3518073), (9, 2345382), (13, 1623726), (18, 1172691), (26, 811863), (27, 781794), (39, 541242), (54, 390897), (78, 270621), (81, 260598), (117, 180414), (162, 130299), (169, 124902), (234, 90207), (243, 86866), (257, 82134), (338, 62451), (351, 60138), (486, 43433), (507, 41634), (514, 41067), (702, 30069), (771, 27378), (1014, 20817), (1053, 20046), (1521, 13878), (1542, 13689), (2106, 10023), (2313, 9126), (3042, 6939), (3159, 6682), (3341, 6318), (4563, 4626)]