18040820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{449}}^1$

素因数の和:513

約数の個数: 72

約数和(自身を含む): 45246600

約数和(自身を除く): 27205780

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 41, 49, 70, 82, 98, 140, 164, 196, 205, 245, 287, 410, 449, 490, 574, 820, 898, 980, 1148, 1435, 1796, 2009, 2245, 2870, 3143, 4018, 4490, 5740, 6286, 8036, 8980, 10045, 12572, 15715, 18409, 20090, 22001, 31430, 36818, 40180, 44002, 62860, 73636, 88004, 92045, 110005, 128863, 184090, 220010, 257726, 368180, 440020, 515452, 644315, 902041, 1288630, 1804082, 2577260, 3608164, 4510205, 9020410, 18040820]

約数ペア:

[(1, 18040820), (2, 9020410), (4, 4510205), (5, 3608164), (7, 2577260), (10, 1804082), (14, 1288630), (20, 902041), (28, 644315), (35, 515452), (41, 440020), (49, 368180), (70, 257726), (82, 220010), (98, 184090), (140, 128863), (164, 110005), (196, 92045), (205, 88004), (245, 73636), (287, 62860), (410, 44002), (449, 40180), (490, 36818), (574, 31430), (820, 22001), (898, 20090), (980, 18409), (1148, 15715), (1435, 12572), (1796, 10045), (2009, 8980), (2245, 8036), (2870, 6286), (3143, 5740), (4018, 4490)]