81220000

素因数分解:

$2^5\times 5^4\times {\mathrm{31}}^1\times {\mathrm{131}}^1$

素因数の和:192

約数の個数: 120

約数和(自身を含む): 207833472

約数和(自身を除く): 126613472

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 32, 40, 50, 62, 80, 100, 124, 125, 131, 155, 160, 200, 248, 250, 262, 310, 400, 496, 500, 524, 620, 625, 655, 775, 800, 992, 1000, 1048, 1240, 1250, 1310, 1550, 2000, 2096, 2480, 2500, 2620, 3100, 3275, 3875, 4000, 4061, 4192, 4960, 5000, 5240, 6200, 6550, 7750, 8122, 10000, 10480, 12400, 13100, 15500, 16244, 16375, 19375, 20000, 20305, 20960, 24800, 26200, 31000, 32488, 32750, 38750, 40610, 52400, 62000, 64976, 65500, 77500, 81220, 81875, 101525, 104800, 124000, 129952, 131000, 155000, 162440, 163750, 203050, 262000, 310000, 324880, 327500, 406100, 507625, 524000, 620000, 649760, 655000, 812200, 1015250, 1310000, 1624400, 2030500, 2538125, 2620000, 3248800, 4061000, 5076250, 8122000, 10152500, 16244000, 20305000, 40610000, 81220000]

約数ペア:

[(1, 81220000), (2, 40610000), (4, 20305000), (5, 16244000), (8, 10152500), (10, 8122000), (16, 5076250), (20, 4061000), (25, 3248800), (31, 2620000), (32, 2538125), (40, 2030500), (50, 1624400), (62, 1310000), (80, 1015250), (100, 812200), (124, 655000), (125, 649760), (131, 620000), (155, 524000), (160, 507625), (200, 406100), (248, 327500), (250, 324880), (262, 310000), (310, 262000), (400, 203050), (496, 163750), (500, 162440), (524, 155000), (620, 131000), (625, 129952), (655, 124000), (775, 104800), (800, 101525), (992, 81875), (1000, 81220), (1048, 77500), (1240, 65500), (1250, 64976), (1310, 62000), (1550, 52400), (2000, 40610), (2096, 38750), (2480, 32750), (2500, 32488), (2620, 31000), (3100, 26200), (3275, 24800), (3875, 20960), (4000, 20305), (4061, 20000), (4192, 19375), (4960, 16375), (5000, 16244), (5240, 15500), (6200, 13100), (6550, 12400), (7750, 10480), (8122, 10000)]