21481642

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{131}}^1$

素因数の和:223

約数の個数: 64

約数和(自身を含む): 43110144

約数和(自身を除く): 21628502

約数列:

[1, 2, 7, 13, 14, 17, 26, 34, 53, 91, 106, 119, 131, 182, 221, 238, 262, 371, 442, 689, 742, 901, 917, 1378, 1547, 1703, 1802, 1834, 2227, 3094, 3406, 4454, 4823, 6307, 6943, 9646, 11713, 11921, 12614, 13886, 15589, 23426, 23842, 28951, 31178, 48601, 57902, 81991, 90259, 97202, 118031, 163982, 180518, 202657, 236062, 405314, 631813, 826217, 1263626, 1534403, 1652434, 3068806, 10740821, 21481642]

約数ペア:

[(1, 21481642), (2, 10740821), (7, 3068806), (13, 1652434), (14, 1534403), (17, 1263626), (26, 826217), (34, 631813), (53, 405314), (91, 236062), (106, 202657), (119, 180518), (131, 163982), (182, 118031), (221, 97202), (238, 90259), (262, 81991), (371, 57902), (442, 48601), (689, 31178), (742, 28951), (901, 23842), (917, 23426), (1378, 15589), (1547, 13886), (1703, 12614), (1802, 11921), (1834, 11713), (2227, 9646), (3094, 6943), (3406, 6307), (4454, 4823)]