65438720

素因数分解:

$2^{10}\times 5^1\times {\mathrm{12781}}^1$

素因数の和:12806

約数の個数: 44

約数和(自身を含む): 156988524

約数和(自身を除く): 91549804

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, 12781, 25562, 51124, 63905, 102248, 127810, 204496, 255620, 408992, 511240, 817984, 1022480, 1635968, 2044960, 3271936, 4089920, 6543872, 8179840, 13087744, 16359680, 32719360, 65438720]

約数ペア:

[(1, 65438720), (2, 32719360), (4, 16359680), (5, 13087744), (8, 8179840), (10, 6543872), (16, 4089920), (20, 3271936), (32, 2044960), (40, 1635968), (64, 1022480), (80, 817984), (128, 511240), (160, 408992), (256, 255620), (320, 204496), (512, 127810), (640, 102248), (1024, 63905), (1280, 51124), (2560, 25562), (5120, 12781)]