388619980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{257}}^1\times {\mathrm{1543}}^1$

素因数の和:1823

約数の個数: 72

約数和(自身を含む): 953654688

約数和(自身を除く): 565034708

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 257, 490, 514, 980, 1028, 1285, 1543, 1799, 2570, 3086, 3598, 5140, 6172, 7196, 7715, 8995, 10801, 12593, 15430, 17990, 21602, 25186, 30860, 35980, 43204, 50372, 54005, 62965, 75607, 108010, 125930, 151214, 216020, 251860, 302428, 378035, 396551, 756070, 793102, 1512140, 1586204, 1982755, 2775857, 3965510, 5551714, 7931020, 11103428, 13879285, 19430999, 27758570, 38861998, 55517140, 77723996, 97154995, 194309990, 388619980]

約数ペア:

[(1, 388619980), (2, 194309990), (4, 97154995), (5, 77723996), (7, 55517140), (10, 38861998), (14, 27758570), (20, 19430999), (28, 13879285), (35, 11103428), (49, 7931020), (70, 5551714), (98, 3965510), (140, 2775857), (196, 1982755), (245, 1586204), (257, 1512140), (490, 793102), (514, 756070), (980, 396551), (1028, 378035), (1285, 302428), (1543, 251860), (1799, 216020), (2570, 151214), (3086, 125930), (3598, 108010), (5140, 75607), (6172, 62965), (7196, 54005), (7715, 50372), (8995, 43204), (10801, 35980), (12593, 30860), (15430, 25186), (17990, 21602)]