21630128

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{103991}}^1$

素因数の和:104012

約数の個数: 20

約数和(自身を含む): 45132528

約数和(自身を除く): 23502400

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 103991, 207982, 415964, 831928, 1351883, 1663856, 2703766, 5407532, 10815064, 21630128]

約数ペア:

[(1, 21630128), (2, 10815064), (4, 5407532), (8, 2703766), (13, 1663856), (16, 1351883), (26, 831928), (52, 415964), (104, 207982), (208, 103991)]