20211806875

素因数分解:

$5^4\times {\mathrm{13}}^1\times {\mathrm{1237}}^1\times {\mathrm{2011}}^1$

素因数の和:3281

約数の個数: 40

約数和(自身を含む): 27235019504

約数和(自身を除く): 7023212629

約数列:

[1, 5, 13, 25, 65, 125, 325, 625, 1237, 1625, 2011, 6185, 8125, 10055, 16081, 26143, 30925, 50275, 80405, 130715, 154625, 251375, 402025, 653575, 773125, 1256875, 2010125, 2487607, 3267875, 10050625, 12438035, 16339375, 32338891, 62190175, 161694455, 310950875, 808472275, 1554754375, 4042361375, 20211806875]

約数ペア:

[(1, 20211806875), (5, 4042361375), (13, 1554754375), (25, 808472275), (65, 310950875), (125, 161694455), (325, 62190175), (625, 32338891), (1237, 16339375), (1625, 12438035), (2011, 10050625), (6185, 3267875), (8125, 2487607), (10055, 2010125), (16081, 1256875), (26143, 773125), (30925, 653575), (50275, 402025), (80405, 251375), (130715, 154625)]