21902517

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{569}}^1$

素因数の和:642

約数の個数: 48

約数和(自身を含む): 39836160

約数和(自身を除く): 17933643

約数列:

[1, 3, 7, 9, 13, 21, 39, 47, 63, 91, 117, 141, 273, 329, 423, 569, 611, 819, 987, 1707, 1833, 2961, 3983, 4277, 5121, 5499, 7397, 11949, 12831, 22191, 26743, 35847, 38493, 51779, 66573, 80229, 155337, 187201, 240687, 347659, 466011, 561603, 1042977, 1684809, 2433613, 3128931, 7300839, 21902517]

約数ペア:

[(1, 21902517), (3, 7300839), (7, 3128931), (9, 2433613), (13, 1684809), (21, 1042977), (39, 561603), (47, 466011), (63, 347659), (91, 240687), (117, 187201), (141, 155337), (273, 80229), (329, 66573), (423, 51779), (569, 38493), (611, 35847), (819, 26743), (987, 22191), (1707, 12831), (1833, 11949), (2961, 7397), (3983, 5499), (4277, 5121)]