21420945

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{5231}}^1$

素因数の和:5262

約数の個数: 48

約数和(自身を含む): 45706752

約数和(自身を除く): 24285807

約数列:

[1, 3, 5, 7, 9, 13, 15, 21, 35, 39, 45, 63, 65, 91, 105, 117, 195, 273, 315, 455, 585, 819, 1365, 4095, 5231, 15693, 26155, 36617, 47079, 68003, 78465, 109851, 183085, 204009, 235395, 329553, 340015, 476021, 549255, 612027, 1020045, 1428063, 1647765, 2380105, 3060135, 4284189, 7140315, 21420945]

約数ペア:

[(1, 21420945), (3, 7140315), (5, 4284189), (7, 3060135), (9, 2380105), (13, 1647765), (15, 1428063), (21, 1020045), (35, 612027), (39, 549255), (45, 476021), (63, 340015), (65, 329553), (91, 235395), (105, 204009), (117, 183085), (195, 109851), (273, 78465), (315, 68003), (455, 47079), (585, 36617), (819, 26155), (1365, 15693), (4095, 5231)]