20457680

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{313}}^1$

素因数の和:388

約数の個数: 80

約数和(自身を含む): 51395520

約数和(自身を除く): 30937840

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 43, 76, 80, 86, 95, 152, 172, 190, 215, 304, 313, 344, 380, 430, 626, 688, 760, 817, 860, 1252, 1520, 1565, 1634, 1720, 2504, 3130, 3268, 3440, 4085, 5008, 5947, 6260, 6536, 8170, 11894, 12520, 13072, 13459, 16340, 23788, 25040, 26918, 29735, 32680, 47576, 53836, 59470, 65360, 67295, 95152, 107672, 118940, 134590, 215344, 237880, 255721, 269180, 475760, 511442, 538360, 1022884, 1076720, 1278605, 2045768, 2557210, 4091536, 5114420, 10228840, 20457680]

約数ペア:

[(1, 20457680), (2, 10228840), (4, 5114420), (5, 4091536), (8, 2557210), (10, 2045768), (16, 1278605), (19, 1076720), (20, 1022884), (38, 538360), (40, 511442), (43, 475760), (76, 269180), (80, 255721), (86, 237880), (95, 215344), (152, 134590), (172, 118940), (190, 107672), (215, 95152), (304, 67295), (313, 65360), (344, 59470), (380, 53836), (430, 47576), (626, 32680), (688, 29735), (760, 26918), (817, 25040), (860, 23788), (1252, 16340), (1520, 13459), (1565, 13072), (1634, 12520), (1720, 11894), (2504, 8170), (3130, 6536), (3268, 6260), (3440, 5947), (4085, 5008)]