21140704

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{571}}^1$

素因数の和:683

約数の個数: 48

約数和(自身を含む): 45405360

約数和(自身を除く): 24264656

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 89, 104, 178, 208, 356, 416, 571, 712, 1142, 1157, 1424, 2284, 2314, 2848, 4568, 4628, 7423, 9136, 9256, 14846, 18272, 18512, 29692, 37024, 50819, 59384, 101638, 118768, 203276, 237536, 406552, 660647, 813104, 1321294, 1626208, 2642588, 5285176, 10570352, 21140704]

約数ペア:

[(1, 21140704), (2, 10570352), (4, 5285176), (8, 2642588), (13, 1626208), (16, 1321294), (26, 813104), (32, 660647), (52, 406552), (89, 237536), (104, 203276), (178, 118768), (208, 101638), (356, 59384), (416, 50819), (571, 37024), (712, 29692), (1142, 18512), (1157, 18272), (1424, 14846), (2284, 9256), (2314, 9136), (2848, 7423), (4568, 4628)]