21356685

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{151}}^1\times {\mathrm{449}}^1$

素因数の和:618

約数の個数: 48

約数和(自身を含む): 42681600

約数和(自身を除く): 21324915

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 151, 315, 449, 453, 755, 1057, 1347, 1359, 2245, 2265, 3143, 3171, 4041, 5285, 6735, 6795, 9429, 9513, 15715, 15855, 20205, 28287, 47145, 47565, 67799, 141435, 203397, 338995, 474593, 610191, 1016985, 1423779, 2372965, 3050955, 4271337, 7118895, 21356685]

約数ペア:

[(1, 21356685), (3, 7118895), (5, 4271337), (7, 3050955), (9, 2372965), (15, 1423779), (21, 1016985), (35, 610191), (45, 474593), (63, 338995), (105, 203397), (151, 141435), (315, 67799), (449, 47565), (453, 47145), (755, 28287), (1057, 20205), (1347, 15855), (1359, 15715), (2245, 9513), (2265, 9429), (3143, 6795), (3171, 6735), (4041, 5285)]