21746725

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{79}}^1$

素因数の和:131

約数の個数: 72

約数和(自身を含む): 36942080

約数和(自身を除く): 15195355

約数列:

[1, 5, 7, 11, 13, 25, 35, 55, 65, 77, 79, 91, 121, 143, 175, 275, 325, 385, 395, 455, 553, 605, 715, 847, 869, 1001, 1027, 1573, 1925, 1975, 2275, 2765, 3025, 3575, 4235, 4345, 5005, 5135, 6083, 7189, 7865, 9559, 11011, 11297, 13825, 21175, 21725, 25025, 25675, 30415, 35945, 39325, 47795, 55055, 56485, 66913, 79079, 124267, 152075, 179725, 238975, 275275, 282425, 334565, 395395, 621335, 869869, 1672825, 1976975, 3106675, 4349345, 21746725]

約数ペア:

[(1, 21746725), (5, 4349345), (7, 3106675), (11, 1976975), (13, 1672825), (25, 869869), (35, 621335), (55, 395395), (65, 334565), (77, 282425), (79, 275275), (91, 238975), (121, 179725), (143, 152075), (175, 124267), (275, 79079), (325, 66913), (385, 56485), (395, 55055), (455, 47795), (553, 39325), (605, 35945), (715, 30415), (847, 25675), (869, 25025), (1001, 21725), (1027, 21175), (1573, 13825), (1925, 11297), (1975, 11011), (2275, 9559), (2765, 7865), (3025, 7189), (3575, 6083), (4235, 5135), (4345, 5005)]