18993975

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1$

素因数の和:78

約数の個数: 144

約数和(自身を含む): 44330496

約数和(自身を除く): 25336521

約数列:

[1, 3, 5, 7, 11, 13, 15, 21, 23, 25, 33, 35, 39, 55, 65, 69, 75, 77, 91, 105, 115, 121, 143, 161, 165, 175, 195, 231, 253, 273, 275, 299, 325, 345, 363, 385, 429, 455, 483, 525, 575, 605, 715, 759, 805, 825, 847, 897, 975, 1001, 1155, 1265, 1365, 1495, 1573, 1725, 1771, 1815, 1925, 2093, 2145, 2275, 2415, 2541, 2783, 3003, 3025, 3289, 3575, 3795, 4025, 4235, 4485, 4719, 5005, 5313, 5775, 6279, 6325, 6825, 7475, 7865, 8349, 8855, 9075, 9867, 10465, 10725, 11011, 12075, 12705, 13915, 15015, 16445, 18975, 19481, 21175, 22425, 23023, 23595, 25025, 26565, 31395, 33033, 36179, 39325, 41745, 44275, 49335, 52325, 55055, 58443, 63525, 69069, 69575, 75075, 82225, 97405, 108537, 115115, 117975, 132825, 156975, 165165, 180895, 208725, 246675, 253253, 275275, 292215, 345345, 487025, 542685, 575575, 759759, 825825, 904475, 1266265, 1461075, 1726725, 2713425, 3798795, 6331325, 18993975]

約数ペア:

[(1, 18993975), (3, 6331325), (5, 3798795), (7, 2713425), (11, 1726725), (13, 1461075), (15, 1266265), (21, 904475), (23, 825825), (25, 759759), (33, 575575), (35, 542685), (39, 487025), (55, 345345), (65, 292215), (69, 275275), (75, 253253), (77, 246675), (91, 208725), (105, 180895), (115, 165165), (121, 156975), (143, 132825), (161, 117975), (165, 115115), (175, 108537), (195, 97405), (231, 82225), (253, 75075), (273, 69575), (275, 69069), (299, 63525), (325, 58443), (345, 55055), (363, 52325), (385, 49335), (429, 44275), (455, 41745), (483, 39325), (525, 36179), (575, 33033), (605, 31395), (715, 26565), (759, 25025), (805, 23595), (825, 23023), (847, 22425), (897, 21175), (975, 19481), (1001, 18975), (1155, 16445), (1265, 15015), (1365, 13915), (1495, 12705), (1573, 12075), (1725, 11011), (1771, 10725), (1815, 10465), (1925, 9867), (2093, 9075), (2145, 8855), (2275, 8349), (2415, 7865), (2541, 7475), (2783, 6825), (3003, 6325), (3025, 6279), (3289, 5775), (3575, 5313), (3795, 5005), (4025, 4719), (4235, 4485)]