18080020

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{971}}^1$

素因数の和:1013

約数の個数: 72

約数和(自身を含む): 46539360

約数和(自身を除く): 28459340

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 49, 70, 76, 95, 98, 133, 140, 190, 196, 245, 266, 380, 490, 532, 665, 931, 971, 980, 1330, 1862, 1942, 2660, 3724, 3884, 4655, 4855, 6797, 9310, 9710, 13594, 18449, 18620, 19420, 27188, 33985, 36898, 47579, 67970, 73796, 92245, 95158, 129143, 135940, 184490, 190316, 237895, 258286, 368980, 475790, 516572, 645715, 904001, 951580, 1291430, 1808002, 2582860, 3616004, 4520005, 9040010, 18080020]

約数ペア:

[(1, 18080020), (2, 9040010), (4, 4520005), (5, 3616004), (7, 2582860), (10, 1808002), (14, 1291430), (19, 951580), (20, 904001), (28, 645715), (35, 516572), (38, 475790), (49, 368980), (70, 258286), (76, 237895), (95, 190316), (98, 184490), (133, 135940), (140, 129143), (190, 95158), (196, 92245), (245, 73796), (266, 67970), (380, 47579), (490, 36898), (532, 33985), (665, 27188), (931, 19420), (971, 18620), (980, 18449), (1330, 13594), (1862, 9710), (1942, 9310), (2660, 6797), (3724, 4855), (3884, 4655)]