20819500

素因数分解:

$2^2\times 5^3\times {\mathrm{13}}^1\times {\mathrm{3203}}^1$

素因数の和:3235

約数の個数: 48

約数和(自身を含む): 48982752

約数和(自身を除く): 28163252

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 125, 130, 250, 260, 325, 500, 650, 1300, 1625, 3203, 3250, 6406, 6500, 12812, 16015, 32030, 41639, 64060, 80075, 83278, 160150, 166556, 208195, 320300, 400375, 416390, 800750, 832780, 1040975, 1601500, 2081950, 4163900, 5204875, 10409750, 20819500]

約数ペア:

[(1, 20819500), (2, 10409750), (4, 5204875), (5, 4163900), (10, 2081950), (13, 1601500), (20, 1040975), (25, 832780), (26, 800750), (50, 416390), (52, 400375), (65, 320300), (100, 208195), (125, 166556), (130, 160150), (250, 83278), (260, 80075), (325, 64060), (500, 41639), (650, 32030), (1300, 16015), (1625, 12812), (3203, 6500), (3250, 6406)]