20820280

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{40039}}^1$

素因数の和:40063

約数の個数: 32

約数和(自身を含む): 50450400

約数和(自身を除く): 29630120

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 40039, 80078, 160156, 200195, 320312, 400390, 520507, 800780, 1041014, 1601560, 2082028, 2602535, 4164056, 5205070, 10410140, 20820280]

約数ペア:

[(1, 20820280), (2, 10410140), (4, 5205070), (5, 4164056), (8, 2602535), (10, 2082028), (13, 1601560), (20, 1041014), (26, 800780), (40, 520507), (52, 400390), (65, 320312), (104, 200195), (130, 160156), (260, 80078), (520, 40039)]