7810000

素因数分解:

$2^4\times 5^4\times {\mathrm{11}}^1\times {\mathrm{71}}^1$

素因数の和:110

約数の個数: 100

約数和(自身を含む): 20918304

約数和(自身を除く): 13108304

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 25, 40, 44, 50, 55, 71, 80, 88, 100, 110, 125, 142, 176, 200, 220, 250, 275, 284, 355, 400, 440, 500, 550, 568, 625, 710, 781, 880, 1000, 1100, 1136, 1250, 1375, 1420, 1562, 1775, 2000, 2200, 2500, 2750, 2840, 3124, 3550, 3905, 4400, 5000, 5500, 5680, 6248, 6875, 7100, 7810, 8875, 10000, 11000, 12496, 13750, 14200, 15620, 17750, 19525, 22000, 27500, 28400, 31240, 35500, 39050, 44375, 55000, 62480, 71000, 78100, 88750, 97625, 110000, 142000, 156200, 177500, 195250, 312400, 355000, 390500, 488125, 710000, 781000, 976250, 1562000, 1952500, 3905000, 7810000]

約数ペア:

[(1, 7810000), (2, 3905000), (4, 1952500), (5, 1562000), (8, 976250), (10, 781000), (11, 710000), (16, 488125), (20, 390500), (22, 355000), (25, 312400), (40, 195250), (44, 177500), (50, 156200), (55, 142000), (71, 110000), (80, 97625), (88, 88750), (100, 78100), (110, 71000), (125, 62480), (142, 55000), (176, 44375), (200, 39050), (220, 35500), (250, 31240), (275, 28400), (284, 27500), (355, 22000), (400, 19525), (440, 17750), (500, 15620), (550, 14200), (568, 13750), (625, 12496), (710, 11000), (781, 10000), (880, 8875), (1000, 7810), (1100, 7100), (1136, 6875), (1250, 6248), (1375, 5680), (1420, 5500), (1562, 5000), (1775, 4400), (2000, 3905), (2200, 3550), (2500, 3124), (2750, 2840)]