20740000

素因数分解:

$2^5\times 5^4\times {\mathrm{17}}^1\times {\mathrm{61}}^1$

素因数の和:108

約数の個数: 120

約数和(自身を含む): 54910548

約数和(自身を除く): 34170548

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 25, 32, 34, 40, 50, 61, 68, 80, 85, 100, 122, 125, 136, 160, 170, 200, 244, 250, 272, 305, 340, 400, 425, 488, 500, 544, 610, 625, 680, 800, 850, 976, 1000, 1037, 1220, 1250, 1360, 1525, 1700, 1952, 2000, 2074, 2125, 2440, 2500, 2720, 3050, 3400, 4000, 4148, 4250, 4880, 5000, 5185, 6100, 6800, 7625, 8296, 8500, 9760, 10000, 10370, 10625, 12200, 13600, 15250, 16592, 17000, 20000, 20740, 21250, 24400, 25925, 30500, 33184, 34000, 38125, 41480, 42500, 48800, 51850, 61000, 68000, 76250, 82960, 85000, 103700, 122000, 129625, 152500, 165920, 170000, 207400, 244000, 259250, 305000, 340000, 414800, 518500, 610000, 648125, 829600, 1037000, 1220000, 1296250, 2074000, 2592500, 4148000, 5185000, 10370000, 20740000]

約数ペア:

[(1, 20740000), (2, 10370000), (4, 5185000), (5, 4148000), (8, 2592500), (10, 2074000), (16, 1296250), (17, 1220000), (20, 1037000), (25, 829600), (32, 648125), (34, 610000), (40, 518500), (50, 414800), (61, 340000), (68, 305000), (80, 259250), (85, 244000), (100, 207400), (122, 170000), (125, 165920), (136, 152500), (160, 129625), (170, 122000), (200, 103700), (244, 85000), (250, 82960), (272, 76250), (305, 68000), (340, 61000), (400, 51850), (425, 48800), (488, 42500), (500, 41480), (544, 38125), (610, 34000), (625, 33184), (680, 30500), (800, 25925), (850, 24400), (976, 21250), (1000, 20740), (1037, 20000), (1220, 17000), (1250, 16592), (1360, 15250), (1525, 13600), (1700, 12200), (1952, 10625), (2000, 10370), (2074, 10000), (2125, 9760), (2440, 8500), (2500, 8296), (2720, 7625), (3050, 6800), (3400, 6100), (4000, 5185), (4148, 5000), (4250, 4880)]