20848750

素因数分解:

$2^1\times 5^4\times {\mathrm{13}}^1\times {\mathrm{1283}}^1$

素因数の和:1318

約数の個数: 40

約数和(自身を含む): 42117768

約数和(自身を除く): 21269018

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 125, 130, 250, 325, 625, 650, 1250, 1283, 1625, 2566, 3250, 6415, 8125, 12830, 16250, 16679, 32075, 33358, 64150, 83395, 160375, 166790, 320750, 416975, 801875, 833950, 1603750, 2084875, 4169750, 10424375, 20848750]

約数ペア:

[(1, 20848750), (2, 10424375), (5, 4169750), (10, 2084875), (13, 1603750), (25, 833950), (26, 801875), (50, 416975), (65, 320750), (125, 166790), (130, 160375), (250, 83395), (325, 64150), (625, 33358), (650, 32075), (1250, 16679), (1283, 16250), (1625, 12830), (2566, 8125), (3250, 6415)]