20950280

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{40289}}^1$

素因数の和:40313

約数の個数: 32

約数和(自身を含む): 50765400

約数和(自身を除く): 29815120

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 40289, 80578, 161156, 201445, 322312, 402890, 523757, 805780, 1047514, 1611560, 2095028, 2618785, 4190056, 5237570, 10475140, 20950280]

約数ペア:

[(1, 20950280), (2, 10475140), (4, 5237570), (5, 4190056), (8, 2618785), (10, 2095028), (13, 1611560), (20, 1047514), (26, 805780), (40, 523757), (52, 402890), (65, 322312), (104, 201445), (130, 161156), (260, 80578), (520, 40289)]