20400485

素因数分解:

$5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{101}}^1\times {\mathrm{199}}^1$

素因数の和:341

約数の個数: 32

約数和(自身を含む): 29376000

約数和(自身を除く): 8975515

約数列:

[1, 5, 7, 29, 35, 101, 145, 199, 203, 505, 707, 995, 1015, 1393, 2929, 3535, 5771, 6965, 14645, 20099, 20503, 28855, 40397, 100495, 102515, 140693, 201985, 582871, 703465, 2914355, 4080097, 20400485]

約数ペア:

[(1, 20400485), (5, 4080097), (7, 2914355), (29, 703465), (35, 582871), (101, 201985), (145, 140693), (199, 102515), (203, 100495), (505, 40397), (707, 28855), (995, 20503), (1015, 20099), (1393, 14645), (2929, 6965), (3535, 5771)]