28202405

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1$

素因数の和:210

約数の個数: 64

約数和(自身を含む): 46448640

約数和(自身を除く): 18246235

約数列:

[1, 5, 7, 11, 17, 31, 35, 55, 77, 85, 119, 139, 155, 187, 217, 341, 385, 527, 595, 695, 935, 973, 1085, 1309, 1529, 1705, 2363, 2387, 2635, 3689, 4309, 4865, 5797, 6545, 7645, 10703, 11815, 11935, 16541, 18445, 21545, 25993, 28985, 30163, 40579, 47399, 53515, 73253, 82705, 129965, 150815, 181951, 202895, 236995, 331793, 366265, 512771, 805783, 909755, 1658965, 2563855, 4028915, 5640481, 28202405]

約数ペア:

[(1, 28202405), (5, 5640481), (7, 4028915), (11, 2563855), (17, 1658965), (31, 909755), (35, 805783), (55, 512771), (77, 366265), (85, 331793), (119, 236995), (139, 202895), (155, 181951), (187, 150815), (217, 129965), (341, 82705), (385, 73253), (527, 53515), (595, 47399), (695, 40579), (935, 30163), (973, 28985), (1085, 25993), (1309, 21545), (1529, 18445), (1705, 16541), (2363, 11935), (2387, 11815), (2635, 10703), (3689, 7645), (4309, 6545), (4865, 5797)]