64639360

素因数分解:

$2^7\times 5^1\times {\mathrm{100999}}^1$

素因数の和:101018

約数の個数: 32

約数和(自身を含む): 154530000

約数和(自身を除く): 89890640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 100999, 201998, 403996, 504995, 807992, 1009990, 1615984, 2019980, 3231968, 4039960, 6463936, 8079920, 12927872, 16159840, 32319680, 64639360]

約数ペア:

[(1, 64639360), (2, 32319680), (4, 16159840), (5, 12927872), (8, 8079920), (10, 6463936), (16, 4039960), (20, 3231968), (32, 2019980), (40, 1615984), (64, 1009990), (80, 807992), (128, 504995), (160, 403996), (320, 201998), (640, 100999)]