20917760

素因数分解:

$2^9\times 5^1\times {\mathrm{8171}}^1$

素因数の和:8194

約数の個数: 40

約数和(自身を含む): 50159736

約数和(自身を除く): 29241976

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 8171, 16342, 32684, 40855, 65368, 81710, 130736, 163420, 261472, 326840, 522944, 653680, 1045888, 1307360, 2091776, 2614720, 4183552, 5229440, 10458880, 20917760]

約数ペア:

[(1, 20917760), (2, 10458880), (4, 5229440), (5, 4183552), (8, 2614720), (10, 2091776), (16, 1307360), (20, 1045888), (32, 653680), (40, 522944), (64, 326840), (80, 261472), (128, 163420), (160, 130736), (256, 81710), (320, 65368), (512, 40855), (640, 32684), (1280, 16342), (2560, 8171)]