20615475

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1$

素因数の和:109

約数の個数: 96

約数和(自身を含む): 40711680

約数和(自身を除く): 20096205

約数列:

[1, 3, 5, 15, 17, 19, 23, 25, 37, 51, 57, 69, 75, 85, 95, 111, 115, 185, 255, 285, 323, 345, 391, 425, 437, 475, 555, 575, 629, 703, 851, 925, 969, 1173, 1275, 1311, 1425, 1615, 1725, 1887, 1955, 2109, 2185, 2553, 2775, 3145, 3515, 4255, 4845, 5865, 6555, 7429, 8075, 9435, 9775, 10545, 10925, 11951, 12765, 14467, 15725, 16169, 17575, 21275, 22287, 24225, 29325, 32775, 35853, 37145, 43401, 47175, 48507, 52725, 59755, 63825, 72335, 80845, 111435, 179265, 185725, 217005, 242535, 274873, 298775, 361675, 404225, 557175, 824619, 896325, 1085025, 1212675, 1374365, 4123095, 6871825, 20615475]

約数ペア:

[(1, 20615475), (3, 6871825), (5, 4123095), (15, 1374365), (17, 1212675), (19, 1085025), (23, 896325), (25, 824619), (37, 557175), (51, 404225), (57, 361675), (69, 298775), (75, 274873), (85, 242535), (95, 217005), (111, 185725), (115, 179265), (185, 111435), (255, 80845), (285, 72335), (323, 63825), (345, 59755), (391, 52725), (425, 48507), (437, 47175), (475, 43401), (555, 37145), (575, 35853), (629, 32775), (703, 29325), (851, 24225), (925, 22287), (969, 21275), (1173, 17575), (1275, 16169), (1311, 15725), (1425, 14467), (1615, 12765), (1725, 11951), (1887, 10925), (1955, 10545), (2109, 9775), (2185, 9435), (2553, 8075), (2775, 7429), (3145, 6555), (3515, 5865), (4255, 4845)]