320417320

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{257}}^1\times {\mathrm{439}}^1$

素因数の和:778

約数の個数: 64

約数和(自身を含む): 735609600

約数和(自身を除く): 415192280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 257, 284, 355, 439, 514, 568, 710, 878, 1028, 1285, 1420, 1756, 2056, 2195, 2570, 2840, 3512, 4390, 5140, 8780, 10280, 17560, 18247, 31169, 36494, 62338, 72988, 91235, 112823, 124676, 145976, 155845, 182470, 225646, 249352, 311690, 364940, 451292, 564115, 623380, 729880, 902584, 1128230, 1246760, 2256460, 4512920, 8010433, 16020866, 32041732, 40052165, 64083464, 80104330, 160208660, 320417320]

約数ペア:

[(1, 320417320), (2, 160208660), (4, 80104330), (5, 64083464), (8, 40052165), (10, 32041732), (20, 16020866), (40, 8010433), (71, 4512920), (142, 2256460), (257, 1246760), (284, 1128230), (355, 902584), (439, 729880), (514, 623380), (568, 564115), (710, 451292), (878, 364940), (1028, 311690), (1285, 249352), (1420, 225646), (1756, 182470), (2056, 155845), (2195, 145976), (2570, 124676), (2840, 112823), (3512, 91235), (4390, 72988), (5140, 62338), (8780, 36494), (10280, 31169), (17560, 18247)]