28967720

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1\times {\mathrm{103}}^1$

素因数の和:282

約数の個数: 64

約数和(自身を含む): 67392000

約数和(自身を除く): 38424280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 89, 103, 158, 178, 206, 316, 356, 395, 412, 445, 515, 632, 712, 790, 824, 890, 1030, 1580, 1780, 2060, 3160, 3560, 4120, 7031, 8137, 9167, 14062, 16274, 18334, 28124, 32548, 35155, 36668, 40685, 45835, 56248, 65096, 70310, 73336, 81370, 91670, 140620, 162740, 183340, 281240, 325480, 366680, 724193, 1448386, 2896772, 3620965, 5793544, 7241930, 14483860, 28967720]

約数ペア:

[(1, 28967720), (2, 14483860), (4, 7241930), (5, 5793544), (8, 3620965), (10, 2896772), (20, 1448386), (40, 724193), (79, 366680), (89, 325480), (103, 281240), (158, 183340), (178, 162740), (206, 140620), (316, 91670), (356, 81370), (395, 73336), (412, 70310), (445, 65096), (515, 56248), (632, 45835), (712, 40685), (790, 36668), (824, 35155), (890, 32548), (1030, 28124), (1580, 18334), (1780, 16274), (2060, 14062), (3160, 9167), (3560, 8137), (4120, 7031)]