20986902

素因数分解:

$2^1\times 3^2\times {\mathrm{23}}^1\times {\mathrm{163}}^1\times {\mathrm{311}}^1$

素因数の和:505

約数の個数: 48

約数和(自身を含む): 47893248

約数和(自身を除く): 26906346

約数列:

[1, 2, 3, 6, 9, 18, 23, 46, 69, 138, 163, 207, 311, 326, 414, 489, 622, 933, 978, 1467, 1866, 2799, 2934, 3749, 5598, 7153, 7498, 11247, 14306, 21459, 22494, 33741, 42918, 50693, 64377, 67482, 101386, 128754, 152079, 304158, 456237, 912474, 1165939, 2331878, 3497817, 6995634, 10493451, 20986902]

約数ペア:

[(1, 20986902), (2, 10493451), (3, 6995634), (6, 3497817), (9, 2331878), (18, 1165939), (23, 912474), (46, 456237), (69, 304158), (138, 152079), (163, 128754), (207, 101386), (311, 67482), (326, 64377), (414, 50693), (489, 42918), (622, 33741), (933, 22494), (978, 21459), (1467, 14306), (1866, 11247), (2799, 7498), (2934, 7153), (3749, 5598)]