21254624

素因数分解:

$2^5\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{439}}^1$

素因数の和:555

約数の個数: 48

約数和(自身を含む): 44906400

約数和(自身を除く): 23651776

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 68, 89, 136, 178, 272, 356, 439, 544, 712, 878, 1424, 1513, 1756, 2848, 3026, 3512, 6052, 7024, 7463, 12104, 14048, 14926, 24208, 29852, 39071, 48416, 59704, 78142, 119408, 156284, 238816, 312568, 625136, 664207, 1250272, 1328414, 2656828, 5313656, 10627312, 21254624]

約数ペア:

[(1, 21254624), (2, 10627312), (4, 5313656), (8, 2656828), (16, 1328414), (17, 1250272), (32, 664207), (34, 625136), (68, 312568), (89, 238816), (136, 156284), (178, 119408), (272, 78142), (356, 59704), (439, 48416), (544, 39071), (712, 29852), (878, 24208), (1424, 14926), (1513, 14048), (1756, 12104), (2848, 7463), (3026, 7024), (3512, 6052)]