21199255

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1$

素因数の和:160

約数の個数: 64

約数和(自身を含む): 34836480

約数和(自身を除く): 13637225

約数列:

[1, 5, 7, 11, 17, 35, 41, 55, 77, 79, 85, 119, 187, 205, 287, 385, 395, 451, 553, 595, 697, 869, 935, 1309, 1343, 1435, 2255, 2765, 3157, 3239, 3485, 4345, 4879, 6083, 6545, 6715, 7667, 9401, 14773, 15785, 16195, 22673, 24395, 30415, 35629, 38335, 47005, 53669, 55063, 73865, 103411, 113365, 178145, 249403, 268345, 275315, 385441, 517055, 605693, 1247015, 1927205, 3028465, 4239851, 21199255]

約数ペア:

[(1, 21199255), (5, 4239851), (7, 3028465), (11, 1927205), (17, 1247015), (35, 605693), (41, 517055), (55, 385441), (77, 275315), (79, 268345), (85, 249403), (119, 178145), (187, 113365), (205, 103411), (287, 73865), (385, 55063), (395, 53669), (451, 47005), (553, 38335), (595, 35629), (697, 30415), (869, 24395), (935, 22673), (1309, 16195), (1343, 15785), (1435, 14773), (2255, 9401), (2765, 7667), (3157, 6715), (3239, 6545), (3485, 6083), (4345, 4879)]