21511764

素因数分解:

$2^2\times 3^3\times {\mathrm{409}}^1\times {\mathrm{487}}^1$

素因数の和:909

約数の個数: 48

約数和(自身を含む): 56022400

約数和(自身を除く): 34510636

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 108, 409, 487, 818, 974, 1227, 1461, 1636, 1948, 2454, 2922, 3681, 4383, 4908, 5844, 7362, 8766, 11043, 13149, 14724, 17532, 22086, 26298, 44172, 52596, 199183, 398366, 597549, 796732, 1195098, 1792647, 2390196, 3585294, 5377941, 7170588, 10755882, 21511764]

約数ペア:

[(1, 21511764), (2, 10755882), (3, 7170588), (4, 5377941), (6, 3585294), (9, 2390196), (12, 1792647), (18, 1195098), (27, 796732), (36, 597549), (54, 398366), (108, 199183), (409, 52596), (487, 44172), (818, 26298), (974, 22086), (1227, 17532), (1461, 14724), (1636, 13149), (1948, 11043), (2454, 8766), (2922, 7362), (3681, 5844), (4383, 4908)]