21196175

素因数分解:

$5^2\times 7^2\times {\mathrm{11}}^3\times {\mathrm{13}}^1$

素因数の和:70

約数の個数: 72

約数和(自身を含む): 36216432

約数和(自身を除く): 15020257

約数列:

[1, 5, 7, 11, 13, 25, 35, 49, 55, 65, 77, 91, 121, 143, 175, 245, 275, 325, 385, 455, 539, 605, 637, 715, 847, 1001, 1225, 1331, 1573, 1925, 2275, 2695, 3025, 3185, 3575, 4235, 5005, 5929, 6655, 7007, 7865, 9317, 11011, 13475, 15925, 17303, 21175, 25025, 29645, 33275, 35035, 39325, 46585, 55055, 65219, 77077, 86515, 121121, 148225, 175175, 232925, 275275, 326095, 385385, 432575, 605605, 847847, 1630475, 1926925, 3028025, 4239235, 21196175]

約数ペア:

[(1, 21196175), (5, 4239235), (7, 3028025), (11, 1926925), (13, 1630475), (25, 847847), (35, 605605), (49, 432575), (55, 385385), (65, 326095), (77, 275275), (91, 232925), (121, 175175), (143, 148225), (175, 121121), (245, 86515), (275, 77077), (325, 65219), (385, 55055), (455, 46585), (539, 39325), (605, 35035), (637, 33275), (715, 29645), (847, 25025), (1001, 21175), (1225, 17303), (1331, 15925), (1573, 13475), (1925, 11011), (2275, 9317), (2695, 7865), (3025, 7007), (3185, 6655), (3575, 5929), (4235, 5005)]