21117621

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{149}}^1\times {\mathrm{397}}^1$

素因数の和:573

約数の個数: 32

約数和(自身を含む): 34387200

約数和(自身を除く): 13269579

約数列:

[1, 3, 7, 17, 21, 51, 119, 149, 357, 397, 447, 1043, 1191, 2533, 2779, 3129, 6749, 7599, 8337, 17731, 20247, 47243, 53193, 59153, 141729, 177459, 414071, 1005601, 1242213, 3016803, 7039207, 21117621]

約数ペア:

[(1, 21117621), (3, 7039207), (7, 3016803), (17, 1242213), (21, 1005601), (51, 414071), (119, 177459), (149, 141729), (357, 59153), (397, 53193), (447, 47243), (1043, 20247), (1191, 17731), (2533, 8337), (2779, 7599), (3129, 6749)]