81797960

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{109}}^1\times {\mathrm{257}}^1$

素因数の和:450

約数の個数: 64

約数和(自身を含む): 189010800

約数和(自身を除く): 107212840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 109, 146, 218, 257, 292, 365, 436, 514, 545, 584, 730, 872, 1028, 1090, 1285, 1460, 2056, 2180, 2570, 2920, 4360, 5140, 7957, 10280, 15914, 18761, 28013, 31828, 37522, 39785, 56026, 63656, 75044, 79570, 93805, 112052, 140065, 150088, 159140, 187610, 224104, 280130, 318280, 375220, 560260, 750440, 1120520, 2044949, 4089898, 8179796, 10224745, 16359592, 20449490, 40898980, 81797960]

約数ペア:

[(1, 81797960), (2, 40898980), (4, 20449490), (5, 16359592), (8, 10224745), (10, 8179796), (20, 4089898), (40, 2044949), (73, 1120520), (109, 750440), (146, 560260), (218, 375220), (257, 318280), (292, 280130), (365, 224104), (436, 187610), (514, 159140), (545, 150088), (584, 140065), (730, 112052), (872, 93805), (1028, 79570), (1090, 75044), (1285, 63656), (1460, 56026), (2056, 39785), (2180, 37522), (2570, 31828), (2920, 28013), (4360, 18761), (5140, 15914), (7957, 10280)]