21715260

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{347}}^1$

素因数の和:515

約数の個数: 96

約数和(自身を含む): 70156800

約数和(自身を除く): 48441540

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 149, 210, 298, 347, 420, 447, 596, 694, 745, 894, 1041, 1043, 1388, 1490, 1735, 1788, 2082, 2086, 2235, 2429, 2980, 3129, 3470, 4164, 4172, 4470, 4858, 5205, 5215, 6258, 6940, 7287, 8940, 9716, 10410, 10430, 12145, 12516, 14574, 15645, 20820, 20860, 24290, 29148, 31290, 36435, 48580, 51703, 62580, 72870, 103406, 145740, 155109, 206812, 258515, 310218, 361921, 517030, 620436, 723842, 775545, 1034060, 1085763, 1447684, 1551090, 1809605, 2171526, 3102180, 3619210, 4343052, 5428815, 7238420, 10857630, 21715260]

約数ペア:

[(1, 21715260), (2, 10857630), (3, 7238420), (4, 5428815), (5, 4343052), (6, 3619210), (7, 3102180), (10, 2171526), (12, 1809605), (14, 1551090), (15, 1447684), (20, 1085763), (21, 1034060), (28, 775545), (30, 723842), (35, 620436), (42, 517030), (60, 361921), (70, 310218), (84, 258515), (105, 206812), (140, 155109), (149, 145740), (210, 103406), (298, 72870), (347, 62580), (420, 51703), (447, 48580), (596, 36435), (694, 31290), (745, 29148), (894, 24290), (1041, 20860), (1043, 20820), (1388, 15645), (1490, 14574), (1735, 12516), (1788, 12145), (2082, 10430), (2086, 10410), (2235, 9716), (2429, 8940), (2980, 7287), (3129, 6940), (3470, 6258), (4164, 5215), (4172, 5205), (4470, 4858)]