21268156

素因数分解:

$2^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{491}}^1$

素因数の和:539

約数の個数: 72

約数和(自身を含む): 49469616

約数和(自身を除く): 28201460

約数列:

[1, 2, 4, 7, 13, 14, 17, 26, 28, 34, 49, 52, 68, 91, 98, 119, 182, 196, 221, 238, 364, 442, 476, 491, 637, 833, 884, 982, 1274, 1547, 1666, 1964, 2548, 3094, 3332, 3437, 6188, 6383, 6874, 8347, 10829, 12766, 13748, 16694, 21658, 24059, 25532, 33388, 43316, 44681, 48118, 58429, 89362, 96236, 108511, 116858, 178724, 217022, 233716, 312767, 409003, 434044, 625534, 759577, 818006, 1251068, 1519154, 1636012, 3038308, 5317039, 10634078, 21268156]

約数ペア:

[(1, 21268156), (2, 10634078), (4, 5317039), (7, 3038308), (13, 1636012), (14, 1519154), (17, 1251068), (26, 818006), (28, 759577), (34, 625534), (49, 434044), (52, 409003), (68, 312767), (91, 233716), (98, 217022), (119, 178724), (182, 116858), (196, 108511), (221, 96236), (238, 89362), (364, 58429), (442, 48118), (476, 44681), (491, 43316), (637, 33388), (833, 25532), (884, 24059), (982, 21658), (1274, 16694), (1547, 13748), (1666, 12766), (1964, 10829), (2548, 8347), (3094, 6874), (3332, 6383), (3437, 6188)]