20718495

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{73}}^1$

素因数の和:161

約数の個数: 96

約数和(自身を含む): 44883072

約数和(自身を除く): 24164577

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 35, 45, 51, 53, 63, 73, 85, 105, 119, 153, 159, 219, 255, 265, 315, 357, 365, 371, 477, 511, 595, 657, 765, 795, 901, 1071, 1095, 1113, 1241, 1533, 1785, 1855, 2385, 2555, 2703, 3285, 3339, 3723, 3869, 4505, 4599, 5355, 5565, 6205, 6307, 7665, 8109, 8687, 11169, 11607, 13515, 16695, 18615, 18921, 19345, 22995, 26061, 27083, 31535, 34821, 40545, 43435, 55845, 56763, 58035, 65773, 78183, 81249, 94605, 130305, 135415, 174105, 197319, 243747, 283815, 328865, 390915, 406245, 460411, 591957, 986595, 1218735, 1381233, 2302055, 2959785, 4143699, 6906165, 20718495]

約数ペア:

[(1, 20718495), (3, 6906165), (5, 4143699), (7, 2959785), (9, 2302055), (15, 1381233), (17, 1218735), (21, 986595), (35, 591957), (45, 460411), (51, 406245), (53, 390915), (63, 328865), (73, 283815), (85, 243747), (105, 197319), (119, 174105), (153, 135415), (159, 130305), (219, 94605), (255, 81249), (265, 78183), (315, 65773), (357, 58035), (365, 56763), (371, 55845), (477, 43435), (511, 40545), (595, 34821), (657, 31535), (765, 27083), (795, 26061), (901, 22995), (1071, 19345), (1095, 18921), (1113, 18615), (1241, 16695), (1533, 13515), (1785, 11607), (1855, 11169), (2385, 8687), (2555, 8109), (2703, 7665), (3285, 6307), (3339, 6205), (3723, 5565), (3869, 5355), (4505, 4599)]