256220740

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{103}}^1\times {\mathrm{2039}}^1$

素因数の和:2212

約数の個数: 48

約数和(自身を含む): 552464640

約数和(自身を除く): 296243900

約数列:

[1, 2, 4, 5, 10, 20, 61, 103, 122, 206, 244, 305, 412, 515, 610, 1030, 1220, 2039, 2060, 4078, 6283, 8156, 10195, 12566, 20390, 25132, 31415, 40780, 62830, 124379, 125660, 210017, 248758, 420034, 497516, 621895, 840068, 1050085, 1243790, 2100170, 2487580, 4200340, 12811037, 25622074, 51244148, 64055185, 128110370, 256220740]

約数ペア:

[(1, 256220740), (2, 128110370), (4, 64055185), (5, 51244148), (10, 25622074), (20, 12811037), (61, 4200340), (103, 2487580), (122, 2100170), (206, 1243790), (244, 1050085), (305, 840068), (412, 621895), (515, 497516), (610, 420034), (1030, 248758), (1220, 210017), (2039, 125660), (2060, 124379), (4078, 62830), (6283, 40780), (8156, 31415), (10195, 25132), (12566, 20390)]