20697880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{2549}}^1$

素因数の和:2596

約数の個数: 64

約数和(自身を含む): 55080000

約数和(自身を除く): 34382120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 29, 35, 40, 56, 58, 70, 116, 140, 145, 203, 232, 280, 290, 406, 580, 812, 1015, 1160, 1624, 2030, 2549, 4060, 5098, 8120, 10196, 12745, 17843, 20392, 25490, 35686, 50980, 71372, 73921, 89215, 101960, 142744, 147842, 178430, 295684, 356860, 369605, 517447, 591368, 713720, 739210, 1034894, 1478420, 2069788, 2587235, 2956840, 4139576, 5174470, 10348940, 20697880]

約数ペア:

[(1, 20697880), (2, 10348940), (4, 5174470), (5, 4139576), (7, 2956840), (8, 2587235), (10, 2069788), (14, 1478420), (20, 1034894), (28, 739210), (29, 713720), (35, 591368), (40, 517447), (56, 369605), (58, 356860), (70, 295684), (116, 178430), (140, 147842), (145, 142744), (203, 101960), (232, 89215), (280, 73921), (290, 71372), (406, 50980), (580, 35686), (812, 25490), (1015, 20392), (1160, 17843), (1624, 12745), (2030, 10196), (2549, 8120), (4060, 5098)]