81650000

素因数分解:

$2^4\times 5^5\times {\mathrm{23}}^1\times {\mathrm{71}}^1$

素因数の和:127

約数の個数: 120

約数和(自身を含む): 209236608

約数和(自身を除く): 127586608

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 25, 40, 46, 50, 71, 80, 92, 100, 115, 125, 142, 184, 200, 230, 250, 284, 355, 368, 400, 460, 500, 568, 575, 625, 710, 920, 1000, 1136, 1150, 1250, 1420, 1633, 1775, 1840, 2000, 2300, 2500, 2840, 2875, 3125, 3266, 3550, 4600, 5000, 5680, 5750, 6250, 6532, 7100, 8165, 8875, 9200, 10000, 11500, 12500, 13064, 14200, 14375, 16330, 17750, 23000, 25000, 26128, 28400, 28750, 32660, 35500, 40825, 44375, 46000, 50000, 57500, 65320, 71000, 71875, 81650, 88750, 115000, 130640, 142000, 143750, 163300, 177500, 204125, 221875, 230000, 287500, 326600, 355000, 408250, 443750, 575000, 653200, 710000, 816500, 887500, 1020625, 1150000, 1633000, 1775000, 2041250, 3266000, 3550000, 4082500, 5103125, 8165000, 10206250, 16330000, 20412500, 40825000, 81650000]

約数ペア:

[(1, 81650000), (2, 40825000), (4, 20412500), (5, 16330000), (8, 10206250), (10, 8165000), (16, 5103125), (20, 4082500), (23, 3550000), (25, 3266000), (40, 2041250), (46, 1775000), (50, 1633000), (71, 1150000), (80, 1020625), (92, 887500), (100, 816500), (115, 710000), (125, 653200), (142, 575000), (184, 443750), (200, 408250), (230, 355000), (250, 326600), (284, 287500), (355, 230000), (368, 221875), (400, 204125), (460, 177500), (500, 163300), (568, 143750), (575, 142000), (625, 130640), (710, 115000), (920, 88750), (1000, 81650), (1136, 71875), (1150, 71000), (1250, 65320), (1420, 57500), (1633, 50000), (1775, 46000), (1840, 44375), (2000, 40825), (2300, 35500), (2500, 32660), (2840, 28750), (2875, 28400), (3125, 26128), (3266, 25000), (3550, 23000), (4600, 17750), (5000, 16330), (5680, 14375), (5750, 14200), (6250, 13064), (6532, 12500), (7100, 11500), (8165, 10000), (8875, 9200)]