20587540

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{647}}^1$

素因数の和:736

約数の個数: 48

約数和(自身を含む): 45505152

約数和(自身を除く): 24917612

約数列:

[1, 2, 4, 5, 10, 20, 37, 43, 74, 86, 148, 172, 185, 215, 370, 430, 647, 740, 860, 1294, 1591, 2588, 3182, 3235, 6364, 6470, 7955, 12940, 15910, 23939, 27821, 31820, 47878, 55642, 95756, 111284, 119695, 139105, 239390, 278210, 478780, 556420, 1029377, 2058754, 4117508, 5146885, 10293770, 20587540]

約数ペア:

[(1, 20587540), (2, 10293770), (4, 5146885), (5, 4117508), (10, 2058754), (20, 1029377), (37, 556420), (43, 478780), (74, 278210), (86, 239390), (148, 139105), (172, 119695), (185, 111284), (215, 95756), (370, 55642), (430, 47878), (647, 31820), (740, 27821), (860, 23939), (1294, 15910), (1591, 12940), (2588, 7955), (3182, 6470), (3235, 6364)]