21111597

素因数分解:

$3^5\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{163}}^1$

素因数の和:232

約数の個数: 48

約数和(自身を含む): 35101248

約数和(自身を除く): 13989651

約数列:

[1, 3, 9, 13, 27, 39, 41, 81, 117, 123, 163, 243, 351, 369, 489, 533, 1053, 1107, 1467, 1599, 2119, 3159, 3321, 4401, 4797, 6357, 6683, 9963, 13203, 14391, 19071, 20049, 39609, 43173, 57213, 60147, 86879, 129519, 171639, 180441, 260637, 514917, 541323, 781911, 1623969, 2345733, 7037199, 21111597]

約数ペア:

[(1, 21111597), (3, 7037199), (9, 2345733), (13, 1623969), (27, 781911), (39, 541323), (41, 514917), (81, 260637), (117, 180441), (123, 171639), (163, 129519), (243, 86879), (351, 60147), (369, 57213), (489, 43173), (533, 39609), (1053, 20049), (1107, 19071), (1467, 14391), (1599, 13203), (2119, 9963), (3159, 6683), (3321, 6357), (4401, 4797)]