21995360

素因数分解:

$2^5\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{139}}^1$

素因数の和:220

約数の個数: 96

約数和(自身を含む): 55883520

約数和(自身を除く): 33888160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 40, 43, 46, 80, 86, 92, 115, 139, 160, 172, 184, 215, 230, 278, 344, 368, 430, 460, 556, 688, 695, 736, 860, 920, 989, 1112, 1376, 1390, 1720, 1840, 1978, 2224, 2780, 3197, 3440, 3680, 3956, 4448, 4945, 5560, 5977, 6394, 6880, 7912, 9890, 11120, 11954, 12788, 15824, 15985, 19780, 22240, 23908, 25576, 29885, 31648, 31970, 39560, 47816, 51152, 59770, 63940, 79120, 95632, 102304, 119540, 127880, 137471, 158240, 191264, 239080, 255760, 274942, 478160, 511520, 549884, 687355, 956320, 1099768, 1374710, 2199536, 2749420, 4399072, 5498840, 10997680, 21995360]

約数ペア:

[(1, 21995360), (2, 10997680), (4, 5498840), (5, 4399072), (8, 2749420), (10, 2199536), (16, 1374710), (20, 1099768), (23, 956320), (32, 687355), (40, 549884), (43, 511520), (46, 478160), (80, 274942), (86, 255760), (92, 239080), (115, 191264), (139, 158240), (160, 137471), (172, 127880), (184, 119540), (215, 102304), (230, 95632), (278, 79120), (344, 63940), (368, 59770), (430, 51152), (460, 47816), (556, 39560), (688, 31970), (695, 31648), (736, 29885), (860, 25576), (920, 23908), (989, 22240), (1112, 19780), (1376, 15985), (1390, 15824), (1720, 12788), (1840, 11954), (1978, 11120), (2224, 9890), (2780, 7912), (3197, 6880), (3440, 6394), (3680, 5977), (3956, 5560), (4448, 4945)]