21211508721

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{173}}^1\times {\mathrm{397}}^1\times {\mathrm{7919}}^1$

素因数の和:8505

約数の個数: 32

約数和(自身を含む): 30714647040

約数和(自身を除く): 9503138319

約数列:

[1, 3, 13, 39, 173, 397, 519, 1191, 2249, 5161, 6747, 7919, 15483, 23757, 68681, 102947, 206043, 308841, 892853, 1369987, 2678559, 3143843, 4109961, 9431529, 17809831, 40869959, 53429493, 122609877, 543884839, 1631654517, 7070502907, 21211508721]

約数ペア:

[(1, 21211508721), (3, 7070502907), (13, 1631654517), (39, 543884839), (173, 122609877), (397, 53429493), (519, 40869959), (1191, 17809831), (2249, 9431529), (5161, 4109961), (6747, 3143843), (7919, 2678559), (15483, 1369987), (23757, 892853), (68681, 308841), (102947, 206043)]