19840000

素因数分解:

$2^{10}\times 5^4\times {\mathrm{31}}^1$

素因数の和:71

約数の個数: 110

約数和(自身を含む): 51158624

約数和(自身を除く): 31318624

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 32, 40, 50, 62, 64, 80, 100, 124, 125, 128, 155, 160, 200, 248, 250, 256, 310, 320, 400, 496, 500, 512, 620, 625, 640, 775, 800, 992, 1000, 1024, 1240, 1250, 1280, 1550, 1600, 1984, 2000, 2480, 2500, 2560, 3100, 3200, 3875, 3968, 4000, 4960, 5000, 5120, 6200, 6400, 7750, 7936, 8000, 9920, 10000, 12400, 12800, 15500, 15872, 16000, 19375, 19840, 20000, 24800, 25600, 31000, 31744, 32000, 38750, 39680, 40000, 49600, 62000, 64000, 77500, 79360, 80000, 99200, 124000, 128000, 155000, 158720, 160000, 198400, 248000, 310000, 320000, 396800, 496000, 620000, 640000, 793600, 992000, 1240000, 1984000, 2480000, 3968000, 4960000, 9920000, 19840000]

約数ペア:

[(1, 19840000), (2, 9920000), (4, 4960000), (5, 3968000), (8, 2480000), (10, 1984000), (16, 1240000), (20, 992000), (25, 793600), (31, 640000), (32, 620000), (40, 496000), (50, 396800), (62, 320000), (64, 310000), (80, 248000), (100, 198400), (124, 160000), (125, 158720), (128, 155000), (155, 128000), (160, 124000), (200, 99200), (248, 80000), (250, 79360), (256, 77500), (310, 64000), (320, 62000), (400, 49600), (496, 40000), (500, 39680), (512, 38750), (620, 32000), (625, 31744), (640, 31000), (775, 25600), (800, 24800), (992, 20000), (1000, 19840), (1024, 19375), (1240, 16000), (1250, 15872), (1280, 15500), (1550, 12800), (1600, 12400), (1984, 10000), (2000, 9920), (2480, 8000), (2500, 7936), (2560, 7750), (3100, 6400), (3200, 6200), (3875, 5120), (3968, 5000), (4000, 4960)]