21282399

素因数分解:

$3^3\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{541}}^1$

素因数の和:628

約数の個数: 32

約数和(自身を含む): 33300480

約数和(自身を除く): 12018081

約数列:

[1, 3, 9, 27, 31, 47, 93, 141, 279, 423, 541, 837, 1269, 1457, 1623, 4371, 4869, 13113, 14607, 16771, 25427, 39339, 50313, 76281, 150939, 228843, 452817, 686529, 788237, 2364711, 7094133, 21282399]

約数ペア:

[(1, 21282399), (3, 7094133), (9, 2364711), (27, 788237), (31, 686529), (47, 452817), (93, 228843), (141, 150939), (279, 76281), (423, 50313), (541, 39339), (837, 25427), (1269, 16771), (1457, 14607), (1623, 13113), (4371, 4869)]