20268045

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{37}}^2\times {\mathrm{47}}^1$

素因数の和:139

約数の個数: 72

約数和(自身を含む): 42142464

約数和(自身を除く): 21874419

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 37, 45, 47, 63, 105, 111, 141, 185, 235, 259, 315, 329, 333, 423, 555, 705, 777, 987, 1295, 1369, 1645, 1665, 1739, 2115, 2331, 2961, 3885, 4107, 4935, 5217, 6845, 8695, 9583, 11655, 12173, 12321, 14805, 15651, 20535, 26085, 28749, 36519, 47915, 60865, 61605, 64343, 78255, 86247, 109557, 143745, 182595, 193029, 321715, 431235, 450401, 547785, 579087, 965145, 1351203, 2252005, 2895435, 4053609, 6756015, 20268045]

約数ペア:

[(1, 20268045), (3, 6756015), (5, 4053609), (7, 2895435), (9, 2252005), (15, 1351203), (21, 965145), (35, 579087), (37, 547785), (45, 450401), (47, 431235), (63, 321715), (105, 193029), (111, 182595), (141, 143745), (185, 109557), (235, 86247), (259, 78255), (315, 64343), (329, 61605), (333, 60865), (423, 47915), (555, 36519), (705, 28749), (777, 26085), (987, 20535), (1295, 15651), (1369, 14805), (1645, 12321), (1665, 12173), (1739, 11655), (2115, 9583), (2331, 8695), (2961, 6845), (3885, 5217), (4107, 4935)]