398704640

素因数分解:

$2^{14}\times 5^1\times {\mathrm{31}}^1\times {\mathrm{157}}^1$

素因数の和:221

約数の個数: 120

約数和(自身を含む): 994019712

約数和(自身を除く): 595315072

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 157, 160, 248, 256, 310, 314, 320, 496, 512, 620, 628, 640, 785, 992, 1024, 1240, 1256, 1280, 1570, 1984, 2048, 2480, 2512, 2560, 3140, 3968, 4096, 4867, 4960, 5024, 5120, 6280, 7936, 8192, 9734, 9920, 10048, 10240, 12560, 15872, 16384, 19468, 19840, 20096, 20480, 24335, 25120, 31744, 38936, 39680, 40192, 40960, 48670, 50240, 63488, 77872, 79360, 80384, 81920, 97340, 100480, 126976, 155744, 158720, 160768, 194680, 200960, 253952, 311488, 317440, 321536, 389360, 401920, 507904, 622976, 634880, 643072, 778720, 803840, 1245952, 1269760, 1286144, 1557440, 1607680, 2491904, 2539520, 2572288, 3114880, 3215360, 4983808, 6229760, 6430720, 9967616, 12459520, 12861440, 19935232, 24919040, 39870464, 49838080, 79740928, 99676160, 199352320, 398704640]

約数ペア:

[(1, 398704640), (2, 199352320), (4, 99676160), (5, 79740928), (8, 49838080), (10, 39870464), (16, 24919040), (20, 19935232), (31, 12861440), (32, 12459520), (40, 9967616), (62, 6430720), (64, 6229760), (80, 4983808), (124, 3215360), (128, 3114880), (155, 2572288), (157, 2539520), (160, 2491904), (248, 1607680), (256, 1557440), (310, 1286144), (314, 1269760), (320, 1245952), (496, 803840), (512, 778720), (620, 643072), (628, 634880), (640, 622976), (785, 507904), (992, 401920), (1024, 389360), (1240, 321536), (1256, 317440), (1280, 311488), (1570, 253952), (1984, 200960), (2048, 194680), (2480, 160768), (2512, 158720), (2560, 155744), (3140, 126976), (3968, 100480), (4096, 97340), (4867, 81920), (4960, 80384), (5024, 79360), (5120, 77872), (6280, 63488), (7936, 50240), (8192, 48670), (9734, 40960), (9920, 40192), (10048, 39680), (10240, 38936), (12560, 31744), (15872, 25120), (16384, 24335), (19468, 20480), (19840, 20096)]