20388784

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{1181}}^1$

素因数の和:1285

約数の個数: 40

約数和(自身を含む): 43090992

約数和(自身を除く): 22702208

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 83, 104, 166, 208, 332, 664, 1079, 1181, 1328, 2158, 2362, 4316, 4724, 8632, 9448, 15353, 17264, 18896, 30706, 61412, 98023, 122824, 196046, 245648, 392092, 784184, 1274299, 1568368, 2548598, 5097196, 10194392, 20388784]

約数ペア:

[(1, 20388784), (2, 10194392), (4, 5097196), (8, 2548598), (13, 1568368), (16, 1274299), (26, 784184), (52, 392092), (83, 245648), (104, 196046), (166, 122824), (208, 98023), (332, 61412), (664, 30706), (1079, 18896), (1181, 17264), (1328, 15353), (2158, 9448), (2362, 8632), (4316, 4724)]