21791770

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{311}}^1$

素因数の和:356

約数の個数: 96

約数和(自身を含む): 53778816

約数和(自身を除く): 31987046

約数列:

[1, 2, 5, 7, 10, 11, 13, 14, 22, 26, 35, 49, 55, 65, 70, 77, 91, 98, 110, 130, 143, 154, 182, 245, 286, 311, 385, 455, 490, 539, 622, 637, 715, 770, 910, 1001, 1078, 1274, 1430, 1555, 2002, 2177, 2695, 3110, 3185, 3421, 4043, 4354, 5005, 5390, 6370, 6842, 7007, 8086, 10010, 10885, 14014, 15239, 17105, 20215, 21770, 23947, 28301, 30478, 34210, 35035, 40430, 44473, 47894, 56602, 70070, 76195, 88946, 119735, 141505, 152390, 167629, 198107, 222365, 239470, 283010, 311311, 335258, 396214, 444730, 622622, 838145, 990535, 1556555, 1676290, 1981070, 2179177, 3113110, 4358354, 10895885, 21791770]

約数ペア:

[(1, 21791770), (2, 10895885), (5, 4358354), (7, 3113110), (10, 2179177), (11, 1981070), (13, 1676290), (14, 1556555), (22, 990535), (26, 838145), (35, 622622), (49, 444730), (55, 396214), (65, 335258), (70, 311311), (77, 283010), (91, 239470), (98, 222365), (110, 198107), (130, 167629), (143, 152390), (154, 141505), (182, 119735), (245, 88946), (286, 76195), (311, 70070), (385, 56602), (455, 47894), (490, 44473), (539, 40430), (622, 35035), (637, 34210), (715, 30478), (770, 28301), (910, 23947), (1001, 21770), (1078, 20215), (1274, 17105), (1430, 15239), (1555, 14014), (2002, 10885), (2177, 10010), (2695, 8086), (3110, 7007), (3185, 6842), (3421, 6370), (4043, 5390), (4354, 5005)]