78100000

素因数分解:

$2^5\times 5^5\times {\mathrm{11}}^1\times {\mathrm{71}}^1$

素因数の和:117

約数の個数: 144

約数和(自身を含む): 212611392

約数和(自身を除く): 134511392

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 25, 32, 40, 44, 50, 55, 71, 80, 88, 100, 110, 125, 142, 160, 176, 200, 220, 250, 275, 284, 352, 355, 400, 440, 500, 550, 568, 625, 710, 781, 800, 880, 1000, 1100, 1136, 1250, 1375, 1420, 1562, 1760, 1775, 2000, 2200, 2272, 2500, 2750, 2840, 3124, 3125, 3550, 3905, 4000, 4400, 5000, 5500, 5680, 6248, 6250, 6875, 7100, 7810, 8800, 8875, 10000, 11000, 11360, 12496, 12500, 13750, 14200, 15620, 17750, 19525, 20000, 22000, 24992, 25000, 27500, 28400, 31240, 34375, 35500, 39050, 44000, 44375, 50000, 55000, 56800, 62480, 68750, 71000, 78100, 88750, 97625, 100000, 110000, 124960, 137500, 142000, 156200, 177500, 195250, 220000, 221875, 275000, 284000, 312400, 355000, 390500, 443750, 488125, 550000, 624800, 710000, 781000, 887500, 976250, 1100000, 1420000, 1562000, 1775000, 1952500, 2440625, 3124000, 3550000, 3905000, 4881250, 7100000, 7810000, 9762500, 15620000, 19525000, 39050000, 78100000]

約数ペア:

[(1, 78100000), (2, 39050000), (4, 19525000), (5, 15620000), (8, 9762500), (10, 7810000), (11, 7100000), (16, 4881250), (20, 3905000), (22, 3550000), (25, 3124000), (32, 2440625), (40, 1952500), (44, 1775000), (50, 1562000), (55, 1420000), (71, 1100000), (80, 976250), (88, 887500), (100, 781000), (110, 710000), (125, 624800), (142, 550000), (160, 488125), (176, 443750), (200, 390500), (220, 355000), (250, 312400), (275, 284000), (284, 275000), (352, 221875), (355, 220000), (400, 195250), (440, 177500), (500, 156200), (550, 142000), (568, 137500), (625, 124960), (710, 110000), (781, 100000), (800, 97625), (880, 88750), (1000, 78100), (1100, 71000), (1136, 68750), (1250, 62480), (1375, 56800), (1420, 55000), (1562, 50000), (1760, 44375), (1775, 44000), (2000, 39050), (2200, 35500), (2272, 34375), (2500, 31240), (2750, 28400), (2840, 27500), (3124, 25000), (3125, 24992), (3550, 22000), (3905, 20000), (4000, 19525), (4400, 17750), (5000, 15620), (5500, 14200), (5680, 13750), (6248, 12500), (6250, 12496), (6875, 11360), (7100, 11000), (7810, 10000), (8800, 8875)]