25390040

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{311}}^1$

素因数の和:492

約数の個数: 64

約数和(自身を含む): 62112960

約数和(自身を除く): 36722920

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 157, 260, 311, 314, 520, 622, 628, 785, 1244, 1256, 1555, 1570, 2041, 2488, 3110, 3140, 4043, 4082, 6220, 6280, 8086, 8164, 10205, 12440, 16172, 16328, 20215, 20410, 32344, 40430, 40820, 48827, 80860, 81640, 97654, 161720, 195308, 244135, 390616, 488270, 634751, 976540, 1269502, 1953080, 2539004, 3173755, 5078008, 6347510, 12695020, 25390040]

約数ペア:

[(1, 25390040), (2, 12695020), (4, 6347510), (5, 5078008), (8, 3173755), (10, 2539004), (13, 1953080), (20, 1269502), (26, 976540), (40, 634751), (52, 488270), (65, 390616), (104, 244135), (130, 195308), (157, 161720), (260, 97654), (311, 81640), (314, 80860), (520, 48827), (622, 40820), (628, 40430), (785, 32344), (1244, 20410), (1256, 20215), (1555, 16328), (1570, 16172), (2041, 12440), (2488, 10205), (3110, 8164), (3140, 8086), (4043, 6280), (4082, 6220)]