20878210

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{191}}^1\times {\mathrm{643}}^1$

素因数の和:858

約数の個数: 32

約数和(自身を含む): 40061952

約数和(自身を除く): 19183742

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 191, 382, 643, 955, 1286, 1910, 3215, 3247, 6430, 6494, 10931, 16235, 21862, 32470, 54655, 109310, 122813, 245626, 614065, 1228130, 2087821, 4175642, 10439105, 20878210]

約数ペア:

[(1, 20878210), (2, 10439105), (5, 4175642), (10, 2087821), (17, 1228130), (34, 614065), (85, 245626), (170, 122813), (191, 109310), (382, 54655), (643, 32470), (955, 21862), (1286, 16235), (1910, 10931), (3215, 6494), (3247, 6430)]