17980000

素因数分解:

$2^5\times 5^4\times {\mathrm{29}}^1\times {\mathrm{31}}^1$

素因数の和:90

約数の個数: 120

約数和(自身を含む): 47234880

約数和(自身を除く): 29254880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 29, 31, 32, 40, 50, 58, 62, 80, 100, 116, 124, 125, 145, 155, 160, 200, 232, 248, 250, 290, 310, 400, 464, 496, 500, 580, 620, 625, 725, 775, 800, 899, 928, 992, 1000, 1160, 1240, 1250, 1450, 1550, 1798, 2000, 2320, 2480, 2500, 2900, 3100, 3596, 3625, 3875, 4000, 4495, 4640, 4960, 5000, 5800, 6200, 7192, 7250, 7750, 8990, 10000, 11600, 12400, 14384, 14500, 15500, 17980, 18125, 19375, 20000, 22475, 23200, 24800, 28768, 29000, 31000, 35960, 36250, 38750, 44950, 58000, 62000, 71920, 72500, 77500, 89900, 112375, 116000, 124000, 143840, 145000, 155000, 179800, 224750, 290000, 310000, 359600, 449500, 561875, 580000, 620000, 719200, 899000, 1123750, 1798000, 2247500, 3596000, 4495000, 8990000, 17980000]

約数ペア:

[(1, 17980000), (2, 8990000), (4, 4495000), (5, 3596000), (8, 2247500), (10, 1798000), (16, 1123750), (20, 899000), (25, 719200), (29, 620000), (31, 580000), (32, 561875), (40, 449500), (50, 359600), (58, 310000), (62, 290000), (80, 224750), (100, 179800), (116, 155000), (124, 145000), (125, 143840), (145, 124000), (155, 116000), (160, 112375), (200, 89900), (232, 77500), (248, 72500), (250, 71920), (290, 62000), (310, 58000), (400, 44950), (464, 38750), (496, 36250), (500, 35960), (580, 31000), (620, 29000), (625, 28768), (725, 24800), (775, 23200), (800, 22475), (899, 20000), (928, 19375), (992, 18125), (1000, 17980), (1160, 15500), (1240, 14500), (1250, 14384), (1450, 12400), (1550, 11600), (1798, 10000), (2000, 8990), (2320, 7750), (2480, 7250), (2500, 7192), (2900, 6200), (3100, 5800), (3596, 5000), (3625, 4960), (3875, 4640), (4000, 4495)]