20412500

素因数分解:

$2^2\times 5^5\times {\mathrm{23}}^1\times {\mathrm{71}}^1$

素因数の和:123

約数の個数: 72

約数和(自身を含む): 47246976

約数和(自身を除く): 26834476

約数列:

[1, 2, 4, 5, 10, 20, 23, 25, 46, 50, 71, 92, 100, 115, 125, 142, 230, 250, 284, 355, 460, 500, 575, 625, 710, 1150, 1250, 1420, 1633, 1775, 2300, 2500, 2875, 3125, 3266, 3550, 5750, 6250, 6532, 7100, 8165, 8875, 11500, 12500, 14375, 16330, 17750, 28750, 32660, 35500, 40825, 44375, 57500, 71875, 81650, 88750, 143750, 163300, 177500, 204125, 221875, 287500, 408250, 443750, 816500, 887500, 1020625, 2041250, 4082500, 5103125, 10206250, 20412500]

約数ペア:

[(1, 20412500), (2, 10206250), (4, 5103125), (5, 4082500), (10, 2041250), (20, 1020625), (23, 887500), (25, 816500), (46, 443750), (50, 408250), (71, 287500), (92, 221875), (100, 204125), (115, 177500), (125, 163300), (142, 143750), (230, 88750), (250, 81650), (284, 71875), (355, 57500), (460, 44375), (500, 40825), (575, 35500), (625, 32660), (710, 28750), (1150, 17750), (1250, 16330), (1420, 14375), (1633, 12500), (1775, 11500), (2300, 8875), (2500, 8165), (2875, 7100), (3125, 6532), (3266, 6250), (3550, 5750)]