49780000

素因数分解:

$2^5\times 5^4\times {\mathrm{19}}^1\times {\mathrm{131}}^1$

素因数の和:180

約数の個数: 120

約数和(自身を含む): 129895920

約数和(自身を除く): 80115920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 25, 32, 38, 40, 50, 76, 80, 95, 100, 125, 131, 152, 160, 190, 200, 250, 262, 304, 380, 400, 475, 500, 524, 608, 625, 655, 760, 800, 950, 1000, 1048, 1250, 1310, 1520, 1900, 2000, 2096, 2375, 2489, 2500, 2620, 3040, 3275, 3800, 4000, 4192, 4750, 4978, 5000, 5240, 6550, 7600, 9500, 9956, 10000, 10480, 11875, 12445, 13100, 15200, 16375, 19000, 19912, 20000, 20960, 23750, 24890, 26200, 32750, 38000, 39824, 47500, 49780, 52400, 62225, 65500, 76000, 79648, 81875, 95000, 99560, 104800, 124450, 131000, 163750, 190000, 199120, 248900, 262000, 311125, 327500, 380000, 398240, 497800, 524000, 622250, 655000, 995600, 1244500, 1310000, 1555625, 1991200, 2489000, 2620000, 3111250, 4978000, 6222500, 9956000, 12445000, 24890000, 49780000]

約数ペア:

[(1, 49780000), (2, 24890000), (4, 12445000), (5, 9956000), (8, 6222500), (10, 4978000), (16, 3111250), (19, 2620000), (20, 2489000), (25, 1991200), (32, 1555625), (38, 1310000), (40, 1244500), (50, 995600), (76, 655000), (80, 622250), (95, 524000), (100, 497800), (125, 398240), (131, 380000), (152, 327500), (160, 311125), (190, 262000), (200, 248900), (250, 199120), (262, 190000), (304, 163750), (380, 131000), (400, 124450), (475, 104800), (500, 99560), (524, 95000), (608, 81875), (625, 79648), (655, 76000), (760, 65500), (800, 62225), (950, 52400), (1000, 49780), (1048, 47500), (1250, 39824), (1310, 38000), (1520, 32750), (1900, 26200), (2000, 24890), (2096, 23750), (2375, 20960), (2489, 20000), (2500, 19912), (2620, 19000), (3040, 16375), (3275, 15200), (3800, 13100), (4000, 12445), (4192, 11875), (4750, 10480), (4978, 10000), (5000, 9956), (5240, 9500), (6550, 7600)]