398197760

素因数分解:

$2^{10}\times 5^1\times {\mathrm{77773}}^1$

素因数の和:77798

約数の個数: 44

約数和(自身を含む): 955220268

約数和(自身を除く): 557022508

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 2560, 5120, 77773, 155546, 311092, 388865, 622184, 777730, 1244368, 1555460, 2488736, 3110920, 4977472, 6221840, 9954944, 12443680, 19909888, 24887360, 39819776, 49774720, 79639552, 99549440, 199098880, 398197760]

約数ペア:

[(1, 398197760), (2, 199098880), (4, 99549440), (5, 79639552), (8, 49774720), (10, 39819776), (16, 24887360), (20, 19909888), (32, 12443680), (40, 9954944), (64, 6221840), (80, 4977472), (128, 3110920), (160, 2488736), (256, 1555460), (320, 1244368), (512, 777730), (640, 622184), (1024, 388865), (1280, 311092), (2560, 155546), (5120, 77773)]