21031888671

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{2616883}}^1$

素因数の和:2616955

約数の個数: 24

約数和(自身を含む): 32658712320

約数和(自身を除く): 11626823649

約数列:

[1, 3, 9, 19, 47, 57, 141, 171, 423, 893, 2679, 8037, 2616883, 7850649, 23551947, 49720777, 122993501, 149162331, 368980503, 447486993, 1106941509, 2336876519, 7010629557, 21031888671]

約数ペア:

[(1, 21031888671), (3, 7010629557), (9, 2336876519), (19, 1106941509), (47, 447486993), (57, 368980503), (141, 149162331), (171, 122993501), (423, 49720777), (893, 23551947), (2679, 7850649), (8037, 2616883)]