21381464

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{2477}}^1$

素因数の和:2579

約数の個数: 32

約数和(自身を含む): 43711920

約数和(自身を除く): 22330456

約数列:

[1, 2, 4, 8, 13, 26, 52, 83, 104, 166, 332, 664, 1079, 2158, 2477, 4316, 4954, 8632, 9908, 19816, 32201, 64402, 128804, 205591, 257608, 411182, 822364, 1644728, 2672683, 5345366, 10690732, 21381464]

約数ペア:

[(1, 21381464), (2, 10690732), (4, 5345366), (8, 2672683), (13, 1644728), (26, 822364), (52, 411182), (83, 257608), (104, 205591), (166, 128804), (332, 64402), (664, 32201), (1079, 19816), (2158, 9908), (2477, 8632), (4316, 4954)]