858639940

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{419}}^1\times {\mathrm{1297}}^1$

素因数の和:1804

約数の個数: 48

約数和(自身を含む): 1831737600

約数和(自身を除く): 973097660

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 419, 790, 838, 1297, 1580, 1676, 2095, 2594, 4190, 5188, 6485, 8380, 12970, 25940, 33101, 66202, 102463, 132404, 165505, 204926, 331010, 409852, 512315, 543443, 662020, 1024630, 1086886, 2049260, 2173772, 2717215, 5434430, 10868860, 42931997, 85863994, 171727988, 214659985, 429319970, 858639940]

約数ペア:

[(1, 858639940), (2, 429319970), (4, 214659985), (5, 171727988), (10, 85863994), (20, 42931997), (79, 10868860), (158, 5434430), (316, 2717215), (395, 2173772), (419, 2049260), (790, 1086886), (838, 1024630), (1297, 662020), (1580, 543443), (1676, 512315), (2095, 409852), (2594, 331010), (4190, 204926), (5188, 165505), (6485, 132404), (8380, 102463), (12970, 66202), (25940, 33101)]