20801300

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{16001}}^1$

素因数の和:16028

約数の個数: 36

約数和(自身を含む): 48614076

約数和(自身を除く): 27812776

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 130, 260, 325, 650, 1300, 16001, 32002, 64004, 80005, 160010, 208013, 320020, 400025, 416026, 800050, 832052, 1040065, 1600100, 2080130, 4160260, 5200325, 10400650, 20801300]

約数ペア:

[(1, 20801300), (2, 10400650), (4, 5200325), (5, 4160260), (10, 2080130), (13, 1600100), (20, 1040065), (25, 832052), (26, 800050), (50, 416026), (52, 400025), (65, 320020), (100, 208013), (130, 160010), (260, 80005), (325, 64004), (650, 32002), (1300, 16001)]