81780140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{2111}}^1$

素因数の和:2282

約数の個数: 48

約数和(自身を含む): 186278400

約数和(自身を除く): 104498260

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 149, 260, 298, 596, 745, 1490, 1937, 2111, 2980, 3874, 4222, 7748, 8444, 9685, 10555, 19370, 21110, 27443, 38740, 42220, 54886, 109772, 137215, 274430, 314539, 548860, 629078, 1258156, 1572695, 3145390, 4089007, 6290780, 8178014, 16356028, 20445035, 40890070, 81780140]

約数ペア:

[(1, 81780140), (2, 40890070), (4, 20445035), (5, 16356028), (10, 8178014), (13, 6290780), (20, 4089007), (26, 3145390), (52, 1572695), (65, 1258156), (130, 629078), (149, 548860), (260, 314539), (298, 274430), (596, 137215), (745, 109772), (1490, 54886), (1937, 42220), (2111, 38740), (2980, 27443), (3874, 21110), (4222, 19370), (7748, 10555), (8444, 9685)]