20128000

素因数分解:

$2^8\times 5^3\times {\mathrm{17}}^1\times {\mathrm{37}}^1$

素因数の和:85

約数の個数: 144

約数和(自身を含む): 54525744

約数和(自身を除く): 34397744

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 25, 32, 34, 37, 40, 50, 64, 68, 74, 80, 85, 100, 125, 128, 136, 148, 160, 170, 185, 200, 250, 256, 272, 296, 320, 340, 370, 400, 425, 500, 544, 592, 629, 640, 680, 740, 800, 850, 925, 1000, 1088, 1184, 1258, 1280, 1360, 1480, 1600, 1700, 1850, 2000, 2125, 2176, 2368, 2516, 2720, 2960, 3145, 3200, 3400, 3700, 4000, 4250, 4352, 4625, 4736, 5032, 5440, 5920, 6290, 6400, 6800, 7400, 8000, 8500, 9250, 9472, 10064, 10880, 11840, 12580, 13600, 14800, 15725, 16000, 17000, 18500, 20128, 21760, 23680, 25160, 27200, 29600, 31450, 32000, 34000, 37000, 40256, 47360, 50320, 54400, 59200, 62900, 68000, 74000, 78625, 80512, 100640, 108800, 118400, 125800, 136000, 148000, 157250, 161024, 201280, 236800, 251600, 272000, 296000, 314500, 402560, 503200, 544000, 592000, 629000, 805120, 1006400, 1184000, 1258000, 2012800, 2516000, 4025600, 5032000, 10064000, 20128000]

約数ペア:

[(1, 20128000), (2, 10064000), (4, 5032000), (5, 4025600), (8, 2516000), (10, 2012800), (16, 1258000), (17, 1184000), (20, 1006400), (25, 805120), (32, 629000), (34, 592000), (37, 544000), (40, 503200), (50, 402560), (64, 314500), (68, 296000), (74, 272000), (80, 251600), (85, 236800), (100, 201280), (125, 161024), (128, 157250), (136, 148000), (148, 136000), (160, 125800), (170, 118400), (185, 108800), (200, 100640), (250, 80512), (256, 78625), (272, 74000), (296, 68000), (320, 62900), (340, 59200), (370, 54400), (400, 50320), (425, 47360), (500, 40256), (544, 37000), (592, 34000), (629, 32000), (640, 31450), (680, 29600), (740, 27200), (800, 25160), (850, 23680), (925, 21760), (1000, 20128), (1088, 18500), (1184, 17000), (1258, 16000), (1280, 15725), (1360, 14800), (1480, 13600), (1600, 12580), (1700, 11840), (1850, 10880), (2000, 10064), (2125, 9472), (2176, 9250), (2368, 8500), (2516, 8000), (2720, 7400), (2960, 6800), (3145, 6400), (3200, 6290), (3400, 5920), (3700, 5440), (4000, 5032), (4250, 4736), (4352, 4625)]