20117500

素因数分解:

$2^2\times 5^4\times {\mathrm{13}}^1\times {\mathrm{619}}^1$

素因数の和:656

約数の個数: 60

約数和(自身を含む): 47453560

約数和(自身を除く): 27336060

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 125, 130, 250, 260, 325, 500, 619, 625, 650, 1238, 1250, 1300, 1625, 2476, 2500, 3095, 3250, 6190, 6500, 8047, 8125, 12380, 15475, 16094, 16250, 30950, 32188, 32500, 40235, 61900, 77375, 80470, 154750, 160940, 201175, 309500, 386875, 402350, 773750, 804700, 1005875, 1547500, 2011750, 4023500, 5029375, 10058750, 20117500]

約数ペア:

[(1, 20117500), (2, 10058750), (4, 5029375), (5, 4023500), (10, 2011750), (13, 1547500), (20, 1005875), (25, 804700), (26, 773750), (50, 402350), (52, 386875), (65, 309500), (100, 201175), (125, 160940), (130, 154750), (250, 80470), (260, 77375), (325, 61900), (500, 40235), (619, 32500), (625, 32188), (650, 30950), (1238, 16250), (1250, 16094), (1300, 15475), (1625, 12380), (2476, 8125), (2500, 8047), (3095, 6500), (3250, 6190)]