291223820

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{439}}^1\times {\mathrm{809}}^1$

素因数の和:1298

約数の個数: 48

約数和(自身を含む): 628689600

約数和(自身を除く): 337465780

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 439, 809, 820, 878, 1618, 1756, 2195, 3236, 4045, 4390, 8090, 8780, 16180, 17999, 33169, 35998, 66338, 71996, 89995, 132676, 165845, 179990, 331690, 355151, 359980, 663380, 710302, 1420604, 1775755, 3551510, 7103020, 14561191, 29122382, 58244764, 72805955, 145611910, 291223820]

約数ペア:

[(1, 291223820), (2, 145611910), (4, 72805955), (5, 58244764), (10, 29122382), (20, 14561191), (41, 7103020), (82, 3551510), (164, 1775755), (205, 1420604), (410, 710302), (439, 663380), (809, 359980), (820, 355151), (878, 331690), (1618, 179990), (1756, 165845), (2195, 132676), (3236, 89995), (4045, 71996), (4390, 66338), (8090, 35998), (8780, 33169), (16180, 17999)]