87707720

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{347}}^1$

素因数の和:518

約数の個数: 64

約数和(自身を含む): 202953600

約数和(自身を除く): 115245880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 89, 142, 178, 284, 347, 355, 356, 445, 568, 694, 710, 712, 890, 1388, 1420, 1735, 1780, 2776, 2840, 3470, 3560, 6319, 6940, 12638, 13880, 24637, 25276, 30883, 31595, 49274, 50552, 61766, 63190, 98548, 123185, 123532, 126380, 154415, 197096, 246370, 247064, 252760, 308830, 492740, 617660, 985480, 1235320, 2192693, 4385386, 8770772, 10963465, 17541544, 21926930, 43853860, 87707720]

約数ペア:

[(1, 87707720), (2, 43853860), (4, 21926930), (5, 17541544), (8, 10963465), (10, 8770772), (20, 4385386), (40, 2192693), (71, 1235320), (89, 985480), (142, 617660), (178, 492740), (284, 308830), (347, 252760), (355, 247064), (356, 246370), (445, 197096), (568, 154415), (694, 126380), (710, 123532), (712, 123185), (890, 98548), (1388, 63190), (1420, 61766), (1735, 50552), (1780, 49274), (2776, 31595), (2840, 30883), (3470, 25276), (3560, 24637), (6319, 13880), (6940, 12638)]