21496670

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{137}}^1$

素因数の和:245

約数の個数: 64

約数和(自身を含む): 45069696

約数和(自身を除く): 23573026

約数列:

[1, 2, 5, 10, 13, 17, 26, 34, 65, 71, 85, 130, 137, 142, 170, 221, 274, 355, 442, 685, 710, 923, 1105, 1207, 1370, 1781, 1846, 2210, 2329, 2414, 3562, 4615, 4658, 6035, 8905, 9230, 9727, 11645, 12070, 15691, 17810, 19454, 23290, 30277, 31382, 48635, 60554, 78455, 97270, 126451, 151385, 156910, 165359, 252902, 302770, 330718, 632255, 826795, 1264510, 1653590, 2149667, 4299334, 10748335, 21496670]

約数ペア:

[(1, 21496670), (2, 10748335), (5, 4299334), (10, 2149667), (13, 1653590), (17, 1264510), (26, 826795), (34, 632255), (65, 330718), (71, 302770), (85, 252902), (130, 165359), (137, 156910), (142, 151385), (170, 126451), (221, 97270), (274, 78455), (355, 60554), (442, 48635), (685, 31382), (710, 30277), (923, 23290), (1105, 19454), (1207, 17810), (1370, 15691), (1781, 12070), (1846, 11645), (2210, 9727), (2329, 9230), (2414, 8905), (3562, 6035), (4615, 4658)]