21081830

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{131}}^1$

素因数の和:186

約数の個数: 96

約数和(自身を含む): 50561280

約数和(自身を除く): 29479450

約数列:

[1, 2, 5, 7, 10, 11, 14, 19, 22, 35, 38, 55, 70, 77, 95, 110, 121, 131, 133, 154, 190, 209, 242, 262, 266, 385, 418, 605, 655, 665, 770, 847, 917, 1045, 1210, 1310, 1330, 1441, 1463, 1694, 1834, 2090, 2299, 2489, 2882, 2926, 4235, 4585, 4598, 4978, 7205, 7315, 8470, 9170, 10087, 11495, 12445, 14410, 14630, 15851, 16093, 17423, 20174, 22990, 24890, 27379, 31702, 32186, 34846, 50435, 54758, 79255, 80465, 87115, 100870, 110957, 136895, 158510, 160930, 174230, 191653, 221914, 273790, 301169, 383306, 554785, 602338, 958265, 1109570, 1505845, 1916530, 2108183, 3011690, 4216366, 10540915, 21081830]

約数ペア:

[(1, 21081830), (2, 10540915), (5, 4216366), (7, 3011690), (10, 2108183), (11, 1916530), (14, 1505845), (19, 1109570), (22, 958265), (35, 602338), (38, 554785), (55, 383306), (70, 301169), (77, 273790), (95, 221914), (110, 191653), (121, 174230), (131, 160930), (133, 158510), (154, 136895), (190, 110957), (209, 100870), (242, 87115), (262, 80465), (266, 79255), (385, 54758), (418, 50435), (605, 34846), (655, 32186), (665, 31702), (770, 27379), (847, 24890), (917, 22990), (1045, 20174), (1210, 17423), (1310, 16093), (1330, 15851), (1441, 14630), (1463, 14410), (1694, 12445), (1834, 11495), (2090, 10087), (2299, 9170), (2489, 8470), (2882, 7315), (2926, 7205), (4235, 4978), (4585, 4598)]