18904275

素因数分解:

$3^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{281}}^1$

素因数の和:333

約数の個数: 72

約数和(自身を含む): 38185056

約数和(自身を除く): 19280781

約数列:

[1, 3, 5, 9, 13, 15, 23, 25, 39, 45, 65, 69, 75, 115, 117, 195, 207, 225, 281, 299, 325, 345, 575, 585, 843, 897, 975, 1035, 1405, 1495, 1725, 2529, 2691, 2925, 3653, 4215, 4485, 5175, 6463, 7025, 7475, 10959, 12645, 13455, 18265, 19389, 21075, 22425, 32315, 32877, 54795, 58167, 63225, 67275, 84019, 91325, 96945, 161575, 164385, 252057, 273975, 290835, 420095, 484725, 756171, 821925, 1260285, 1454175, 2100475, 3780855, 6301425, 18904275]

約数ペア:

[(1, 18904275), (3, 6301425), (5, 3780855), (9, 2100475), (13, 1454175), (15, 1260285), (23, 821925), (25, 756171), (39, 484725), (45, 420095), (65, 290835), (69, 273975), (75, 252057), (115, 164385), (117, 161575), (195, 96945), (207, 91325), (225, 84019), (281, 67275), (299, 63225), (325, 58167), (345, 54795), (575, 32877), (585, 32315), (843, 22425), (897, 21075), (975, 19389), (1035, 18265), (1405, 13455), (1495, 12645), (1725, 10959), (2529, 7475), (2691, 7025), (2925, 6463), (3653, 5175), (4215, 4485)]