20559825

素因数分解:

$3^4\times 5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1$

素因数の和:117

約数の個数: 120

約数和(自身を含む): 45372096

約数和(自身を除く): 24812271

約数列:

[1, 3, 5, 9, 11, 13, 15, 25, 27, 33, 39, 45, 55, 65, 71, 75, 81, 99, 117, 135, 143, 165, 195, 213, 225, 275, 297, 325, 351, 355, 405, 429, 495, 585, 639, 675, 715, 781, 825, 891, 923, 975, 1053, 1065, 1287, 1485, 1755, 1775, 1917, 2025, 2145, 2343, 2475, 2769, 2925, 3195, 3575, 3861, 3905, 4455, 4615, 5265, 5325, 5751, 6435, 7029, 7425, 8307, 8775, 9585, 10153, 10725, 11583, 11715, 13845, 15975, 19305, 19525, 21087, 22275, 23075, 24921, 26325, 28755, 30459, 32175, 35145, 41535, 47925, 50765, 57915, 58575, 63261, 69225, 74763, 91377, 96525, 105435, 124605, 143775, 152295, 175725, 207675, 253825, 274131, 289575, 316305, 373815, 456885, 527175, 623025, 761475, 822393, 1370655, 1581525, 1869075, 2284425, 4111965, 6853275, 20559825]

約数ペア:

[(1, 20559825), (3, 6853275), (5, 4111965), (9, 2284425), (11, 1869075), (13, 1581525), (15, 1370655), (25, 822393), (27, 761475), (33, 623025), (39, 527175), (45, 456885), (55, 373815), (65, 316305), (71, 289575), (75, 274131), (81, 253825), (99, 207675), (117, 175725), (135, 152295), (143, 143775), (165, 124605), (195, 105435), (213, 96525), (225, 91377), (275, 74763), (297, 69225), (325, 63261), (351, 58575), (355, 57915), (405, 50765), (429, 47925), (495, 41535), (585, 35145), (639, 32175), (675, 30459), (715, 28755), (781, 26325), (825, 24921), (891, 23075), (923, 22275), (975, 21087), (1053, 19525), (1065, 19305), (1287, 15975), (1485, 13845), (1755, 11715), (1775, 11583), (1917, 10725), (2025, 10153), (2145, 9585), (2343, 8775), (2475, 8307), (2769, 7425), (2925, 7029), (3195, 6435), (3575, 5751), (3861, 5325), (3905, 5265), (4455, 4615)]