65721680

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{10399}}^1$

素因数の和:10491

約数の個数: 40

約数和(自身を含む): 154752000

約数和(自身を除く): 89030320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 158, 316, 395, 632, 790, 1264, 1580, 3160, 6320, 10399, 20798, 41596, 51995, 83192, 103990, 166384, 207980, 415960, 821521, 831920, 1643042, 3286084, 4107605, 6572168, 8215210, 13144336, 16430420, 32860840, 65721680]

約数ペア:

[(1, 65721680), (2, 32860840), (4, 16430420), (5, 13144336), (8, 8215210), (10, 6572168), (16, 4107605), (20, 3286084), (40, 1643042), (79, 831920), (80, 821521), (158, 415960), (316, 207980), (395, 166384), (632, 103990), (790, 83192), (1264, 51995), (1580, 41596), (3160, 20798), (6320, 10399)]