20307664

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{1097}}^1$

素因数の和:1207

約数の個数: 40

約数和(自身を含む): 42887880

約数和(自身を除く): 22580216

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 89, 104, 178, 208, 356, 712, 1097, 1157, 1424, 2194, 2314, 4388, 4628, 8776, 9256, 14261, 17552, 18512, 28522, 57044, 97633, 114088, 195266, 228176, 390532, 781064, 1269229, 1562128, 2538458, 5076916, 10153832, 20307664]

約数ペア:

[(1, 20307664), (2, 10153832), (4, 5076916), (8, 2538458), (13, 1562128), (16, 1269229), (26, 781064), (52, 390532), (89, 228176), (104, 195266), (178, 114088), (208, 97633), (356, 57044), (712, 28522), (1097, 18512), (1157, 17552), (1424, 14261), (2194, 9256), (2314, 8776), (4388, 4628)]