21877760

素因数分解:

$2^{10}\times 5^1\times {\mathrm{4273}}^1$

素因数の和:4298

約数の個数: 44

約数和(自身を含む): 52493268

約数和(自身を除く): 30615508

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 2560, 4273, 5120, 8546, 17092, 21365, 34184, 42730, 68368, 85460, 136736, 170920, 273472, 341840, 546944, 683680, 1093888, 1367360, 2187776, 2734720, 4375552, 5469440, 10938880, 21877760]

約数ペア:

[(1, 21877760), (2, 10938880), (4, 5469440), (5, 4375552), (8, 2734720), (10, 2187776), (16, 1367360), (20, 1093888), (32, 683680), (40, 546944), (64, 341840), (80, 273472), (128, 170920), (160, 136736), (256, 85460), (320, 68368), (512, 42730), (640, 34184), (1024, 21365), (1280, 17092), (2560, 8546), (4273, 5120)]