21549424

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{313}}^1\times {\mathrm{331}}^1$

素因数の和:665

約数の個数: 40

約数和(自身を含む): 45243632

約数和(自身を除く): 23694208

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 313, 331, 626, 662, 1252, 1324, 2504, 2648, 4069, 4303, 5008, 5296, 8138, 8606, 16276, 17212, 32552, 34424, 65104, 68848, 103603, 207206, 414412, 828824, 1346839, 1657648, 2693678, 5387356, 10774712, 21549424]

約数ペア:

[(1, 21549424), (2, 10774712), (4, 5387356), (8, 2693678), (13, 1657648), (16, 1346839), (26, 828824), (52, 414412), (104, 207206), (208, 103603), (313, 68848), (331, 65104), (626, 34424), (662, 32552), (1252, 17212), (1324, 16276), (2504, 8606), (2648, 8138), (4069, 5296), (4303, 5008)]