198400000

素因数分解:

$2^{11}\times 5^5\times {\mathrm{31}}^1$

素因数の和:78

約数の個数: 144

約数和(自身を含む): 511842240

約数和(自身を除く): 313442240

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, 2048, 2480, 2500, 2560, 3100, 3125, 3200, 3875, 3968, 4000, 4960, 5000, 5120, 6200, 6250, 6400, 7750, 7936, 8000, 9920, 10000, 10240, 12400, 12500, 12800, 15500, 15872, 16000, 19375, 19840, 20000, 24800, 25000, 25600, 31000, 31744, 32000, 38750, 39680, 40000, 49600, 50000, 51200, 62000, 63488, 64000, 77500, 79360, 80000, 96875, 99200, 100000, 124000, 128000, 155000, 158720, 160000, 193750, 198400, 200000, 248000, 256000, 310000, 317440, 320000, 387500, 396800, 400000, 496000, 620000, 640000, 775000, 793600, 800000, 992000, 1240000, 1280000, 1550000, 1587200, 1600000, 1984000, 2480000, 3100000, 3200000, 3968000, 4960000, 6200000, 6400000, 7936000, 9920000, 12400000, 19840000, 24800000, 39680000, 49600000, 99200000, 198400000]

約数ペア:

[(1, 198400000), (2, 99200000), (4, 49600000), (5, 39680000), (8, 24800000), (10, 19840000), (16, 12400000), (20, 9920000), (25, 7936000), (31, 6400000), (32, 6200000), (40, 4960000), (50, 3968000), (62, 3200000), (64, 3100000), (80, 2480000), (100, 1984000), (124, 1600000), (125, 1587200), (128, 1550000), (155, 1280000), (160, 1240000), (200, 992000), (248, 800000), (250, 793600), (256, 775000), (310, 640000), (320, 620000), (400, 496000), (496, 400000), (500, 396800), (512, 387500), (620, 320000), (625, 317440), (640, 310000), (775, 256000), (800, 248000), (992, 200000), (1000, 198400), (1024, 193750), (1240, 160000), (1250, 158720), (1280, 155000), (1550, 128000), (1600, 124000), (1984, 100000), (2000, 99200), (2048, 96875), (2480, 80000), (2500, 79360), (2560, 77500), (3100, 64000), (3125, 63488), (3200, 62000), (3875, 51200), (3968, 50000), (4000, 49600), (4960, 40000), (5000, 39680), (5120, 38750), (6200, 32000), (6250, 31744), (6400, 31000), (7750, 25600), (7936, 25000), (8000, 24800), (9920, 20000), (10000, 19840), (10240, 19375), (12400, 16000), (12500, 15872), (12800, 15500)]