128859451880

素因数分解:

$2^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{331}}^1\times {\mathrm{61991}}^1$

素因数の和:62490

約数の個数: 64

約数和(自身を含む): 292666711680

約数和(自身を除く): 163807259800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 157, 314, 331, 628, 662, 785, 1256, 1324, 1570, 1655, 2648, 3140, 3310, 6280, 6620, 13240, 51967, 61991, 103934, 123982, 207868, 247964, 259835, 309955, 415736, 495928, 519670, 619910, 1039340, 1239820, 2078680, 2479640, 9732587, 19465174, 20519021, 38930348, 41038042, 48662935, 77860696, 82076084, 97325870, 102595105, 164152168, 194651740, 205190210, 389303480, 410380420, 820760840, 3221486297, 6442972594, 12885945188, 16107431485, 25771890376, 32214862970, 64429725940, 128859451880]

約数ペア:

[(1, 128859451880), (2, 64429725940), (4, 32214862970), (5, 25771890376), (8, 16107431485), (10, 12885945188), (20, 6442972594), (40, 3221486297), (157, 820760840), (314, 410380420), (331, 389303480), (628, 205190210), (662, 194651740), (785, 164152168), (1256, 102595105), (1324, 97325870), (1570, 82076084), (1655, 77860696), (2648, 48662935), (3140, 41038042), (3310, 38930348), (6280, 20519021), (6620, 19465174), (13240, 9732587), (51967, 2479640), (61991, 2078680), (103934, 1239820), (123982, 1039340), (207868, 619910), (247964, 519670), (259835, 495928), (309955, 415736)]