81484840

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1\times {\mathrm{487}}^1$

素因数の和:634

約数の個数: 64

約数和(自身を含む): 189734400

約数和(自身を除く): 108249560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 89, 94, 178, 188, 235, 356, 376, 445, 470, 487, 712, 890, 940, 974, 1780, 1880, 1948, 2435, 3560, 3896, 4183, 4870, 8366, 9740, 16732, 19480, 20915, 22889, 33464, 41830, 43343, 45778, 83660, 86686, 91556, 114445, 167320, 173372, 183112, 216715, 228890, 346744, 433430, 457780, 866860, 915560, 1733720, 2037121, 4074242, 8148484, 10185605, 16296968, 20371210, 40742420, 81484840]

約数ペア:

[(1, 81484840), (2, 40742420), (4, 20371210), (5, 16296968), (8, 10185605), (10, 8148484), (20, 4074242), (40, 2037121), (47, 1733720), (89, 915560), (94, 866860), (178, 457780), (188, 433430), (235, 346744), (356, 228890), (376, 216715), (445, 183112), (470, 173372), (487, 167320), (712, 114445), (890, 91556), (940, 86686), (974, 83660), (1780, 45778), (1880, 43343), (1948, 41830), (2435, 33464), (3560, 22889), (3896, 20915), (4183, 19480), (4870, 16732), (8366, 9740)]