28661560

素因数分解:

$2^3\times 5^1\times {\mathrm{83}}^1\times {\mathrm{89}}^1\times {\mathrm{97}}^1$

素因数の和:280

約数の個数: 64

約数和(自身を含む): 66679200

約数和(自身を除く): 38017640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 83, 89, 97, 166, 178, 194, 332, 356, 388, 415, 445, 485, 664, 712, 776, 830, 890, 970, 1660, 1780, 1940, 3320, 3560, 3880, 7387, 8051, 8633, 14774, 16102, 17266, 29548, 32204, 34532, 36935, 40255, 43165, 59096, 64408, 69064, 73870, 80510, 86330, 147740, 161020, 172660, 295480, 322040, 345320, 716539, 1433078, 2866156, 3582695, 5732312, 7165390, 14330780, 28661560]

約数ペア:

[(1, 28661560), (2, 14330780), (4, 7165390), (5, 5732312), (8, 3582695), (10, 2866156), (20, 1433078), (40, 716539), (83, 345320), (89, 322040), (97, 295480), (166, 172660), (178, 161020), (194, 147740), (332, 86330), (356, 80510), (388, 73870), (415, 69064), (445, 64408), (485, 59096), (664, 43165), (712, 40255), (776, 36935), (830, 34532), (890, 32204), (970, 29548), (1660, 17266), (1780, 16102), (1940, 14774), (3320, 8633), (3560, 8051), (3880, 7387)]