18085720

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{449}}^1$

素因数の和:532

約数の個数: 64

約数和(自身を含む): 43740000

約数和(自身を除く): 25654280

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 53, 76, 95, 106, 152, 190, 212, 265, 380, 424, 449, 530, 760, 898, 1007, 1060, 1796, 2014, 2120, 2245, 3592, 4028, 4490, 5035, 8056, 8531, 8980, 10070, 17062, 17960, 20140, 23797, 34124, 40280, 42655, 47594, 68248, 85310, 95188, 118985, 170620, 190376, 237970, 341240, 452143, 475940, 904286, 951880, 1808572, 2260715, 3617144, 4521430, 9042860, 18085720]

約数ペア:

[(1, 18085720), (2, 9042860), (4, 4521430), (5, 3617144), (8, 2260715), (10, 1808572), (19, 951880), (20, 904286), (38, 475940), (40, 452143), (53, 341240), (76, 237970), (95, 190376), (106, 170620), (152, 118985), (190, 95188), (212, 85310), (265, 68248), (380, 47594), (424, 42655), (449, 40280), (530, 34124), (760, 23797), (898, 20140), (1007, 17960), (1060, 17062), (1796, 10070), (2014, 8980), (2120, 8531), (2245, 8056), (3592, 5035), (4028, 4490)]