20287728

素因数分解:

$2^4\times 3^2\times {\mathrm{89}}^1\times {\mathrm{1583}}^1$

素因数の和:1686

約数の個数: 60

約数和(自身を含む): 57451680

約数和(自身を除く): 37163952

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 36, 48, 72, 89, 144, 178, 267, 356, 534, 712, 801, 1068, 1424, 1583, 1602, 2136, 3166, 3204, 4272, 4749, 6332, 6408, 9498, 12664, 12816, 14247, 18996, 25328, 28494, 37992, 56988, 75984, 113976, 140887, 227952, 281774, 422661, 563548, 845322, 1127096, 1267983, 1690644, 2254192, 2535966, 3381288, 5071932, 6762576, 10143864, 20287728]

約数ペア:

[(1, 20287728), (2, 10143864), (3, 6762576), (4, 5071932), (6, 3381288), (8, 2535966), (9, 2254192), (12, 1690644), (16, 1267983), (18, 1127096), (24, 845322), (36, 563548), (48, 422661), (72, 281774), (89, 227952), (144, 140887), (178, 113976), (267, 75984), (356, 56988), (534, 37992), (712, 28494), (801, 25328), (1068, 18996), (1424, 14247), (1583, 12816), (1602, 12664), (2136, 9498), (3166, 6408), (3204, 6332), (4272, 4749)]