20946250

素因数分解:

$2^1\times 5^4\times {\mathrm{13}}^1\times {\mathrm{1289}}^1$

素因数の和:1324

約数の個数: 40

約数和(自身を含む): 42314580

約数和(自身を除く): 21368330

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 125, 130, 250, 325, 625, 650, 1250, 1289, 1625, 2578, 3250, 6445, 8125, 12890, 16250, 16757, 32225, 33514, 64450, 83785, 161125, 167570, 322250, 418925, 805625, 837850, 1611250, 2094625, 4189250, 10473125, 20946250]

約数ペア:

[(1, 20946250), (2, 10473125), (5, 4189250), (10, 2094625), (13, 1611250), (25, 837850), (26, 805625), (50, 418925), (65, 322250), (125, 167570), (130, 161125), (250, 83785), (325, 64450), (625, 33514), (650, 32225), (1250, 16757), (1289, 16250), (1625, 12890), (2578, 8125), (3250, 6445)]