20891475

素因数分解:

$3^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{367}}^1$

素因数の和:417

約数の個数: 72

約数和(自身を含む): 42711552

約数和(自身を除く): 21820077

約数列:

[1, 3, 5, 9, 11, 15, 23, 25, 33, 45, 55, 69, 75, 99, 115, 165, 207, 225, 253, 275, 345, 367, 495, 575, 759, 825, 1035, 1101, 1265, 1725, 1835, 2277, 2475, 3303, 3795, 4037, 5175, 5505, 6325, 8441, 9175, 11385, 12111, 16515, 18975, 20185, 25323, 27525, 36333, 42205, 56925, 60555, 75969, 82575, 92851, 100925, 126615, 181665, 211025, 278553, 302775, 379845, 464255, 633075, 835659, 908325, 1392765, 1899225, 2321275, 4178295, 6963825, 20891475]

約数ペア:

[(1, 20891475), (3, 6963825), (5, 4178295), (9, 2321275), (11, 1899225), (15, 1392765), (23, 908325), (25, 835659), (33, 633075), (45, 464255), (55, 379845), (69, 302775), (75, 278553), (99, 211025), (115, 181665), (165, 126615), (207, 100925), (225, 92851), (253, 82575), (275, 75969), (345, 60555), (367, 56925), (495, 42205), (575, 36333), (759, 27525), (825, 25323), (1035, 20185), (1101, 18975), (1265, 16515), (1725, 12111), (1835, 11385), (2277, 9175), (2475, 8441), (3303, 6325), (3795, 5505), (4037, 5175)]