71335280

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{233}}^1$

素因数の和:378

約数の個数: 80

約数和(自身を含む): 172355040

約数和(自身を除く): 101019760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 89, 172, 178, 215, 233, 344, 356, 430, 445, 466, 688, 712, 860, 890, 932, 1165, 1424, 1720, 1780, 1864, 2330, 3440, 3560, 3728, 3827, 4660, 7120, 7654, 9320, 10019, 15308, 18640, 19135, 20038, 20737, 30616, 38270, 40076, 41474, 50095, 61232, 76540, 80152, 82948, 100190, 103685, 153080, 160304, 165896, 200380, 207370, 306160, 331792, 400760, 414740, 801520, 829480, 891691, 1658960, 1783382, 3566764, 4458455, 7133528, 8916910, 14267056, 17833820, 35667640, 71335280]

約数ペア:

[(1, 71335280), (2, 35667640), (4, 17833820), (5, 14267056), (8, 8916910), (10, 7133528), (16, 4458455), (20, 3566764), (40, 1783382), (43, 1658960), (80, 891691), (86, 829480), (89, 801520), (172, 414740), (178, 400760), (215, 331792), (233, 306160), (344, 207370), (356, 200380), (430, 165896), (445, 160304), (466, 153080), (688, 103685), (712, 100190), (860, 82948), (890, 80152), (932, 76540), (1165, 61232), (1424, 50095), (1720, 41474), (1780, 40076), (1864, 38270), (2330, 30616), (3440, 20737), (3560, 20038), (3728, 19135), (3827, 18640), (4660, 15308), (7120, 10019), (7654, 9320)]