217559620

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{349}}^1\times {\mathrm{439}}^1$

素因数の和:868

約数の個数: 48

約数和(自身を含む): 465696000

約数和(自身を除く): 248136380

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 349, 355, 439, 698, 710, 878, 1396, 1420, 1745, 1756, 2195, 3490, 4390, 6980, 8780, 24779, 31169, 49558, 62338, 99116, 123895, 124676, 153211, 155845, 247790, 306422, 311690, 495580, 612844, 623380, 766055, 1532110, 3064220, 10877981, 21755962, 43511924, 54389905, 108779810, 217559620]

約数ペア:

[(1, 217559620), (2, 108779810), (4, 54389905), (5, 43511924), (10, 21755962), (20, 10877981), (71, 3064220), (142, 1532110), (284, 766055), (349, 623380), (355, 612844), (439, 495580), (698, 311690), (710, 306422), (878, 247790), (1396, 155845), (1420, 153211), (1745, 124676), (1756, 123895), (2195, 99116), (3490, 62338), (4390, 49558), (6980, 31169), (8780, 24779)]