18519980

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{863}}^1$

素因数の和:938

約数の個数: 48

約数和(自身を含む): 41368320

約数和(自身を除く): 22848340

約数列:

[1, 2, 4, 5, 10, 20, 29, 37, 58, 74, 116, 145, 148, 185, 290, 370, 580, 740, 863, 1073, 1726, 2146, 3452, 4292, 4315, 5365, 8630, 10730, 17260, 21460, 25027, 31931, 50054, 63862, 100108, 125135, 127724, 159655, 250270, 319310, 500540, 638620, 925999, 1851998, 3703996, 4629995, 9259990, 18519980]

約数ペア:

[(1, 18519980), (2, 9259990), (4, 4629995), (5, 3703996), (10, 1851998), (20, 925999), (29, 638620), (37, 500540), (58, 319310), (74, 250270), (116, 159655), (145, 127724), (148, 125135), (185, 100108), (290, 63862), (370, 50054), (580, 31931), (740, 25027), (863, 21460), (1073, 17260), (1726, 10730), (2146, 8630), (3452, 5365), (4292, 4315)]