20427440

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{167}}^1$

素因数の和:330

約数の個数: 80

約数和(自身を含む): 52496640

約数和(自身を除く): 32069200

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 139, 167, 176, 220, 278, 334, 440, 556, 668, 695, 835, 880, 1112, 1336, 1390, 1529, 1670, 1837, 2224, 2672, 2780, 3058, 3340, 3674, 5560, 6116, 6680, 7348, 7645, 9185, 11120, 12232, 13360, 14696, 15290, 18370, 23213, 24464, 29392, 30580, 36740, 46426, 61160, 73480, 92852, 116065, 122320, 146960, 185704, 232130, 255343, 371408, 464260, 510686, 928520, 1021372, 1276715, 1857040, 2042744, 2553430, 4085488, 5106860, 10213720, 20427440]

約数ペア:

[(1, 20427440), (2, 10213720), (4, 5106860), (5, 4085488), (8, 2553430), (10, 2042744), (11, 1857040), (16, 1276715), (20, 1021372), (22, 928520), (40, 510686), (44, 464260), (55, 371408), (80, 255343), (88, 232130), (110, 185704), (139, 146960), (167, 122320), (176, 116065), (220, 92852), (278, 73480), (334, 61160), (440, 46426), (556, 36740), (668, 30580), (695, 29392), (835, 24464), (880, 23213), (1112, 18370), (1336, 15290), (1390, 14696), (1529, 13360), (1670, 12232), (1837, 11120), (2224, 9185), (2672, 7645), (2780, 7348), (3058, 6680), (3340, 6116), (3674, 5560)]