21159819

素因数分解:

$3^3\times {\mathrm{37}}^1\times {\mathrm{59}}^1\times {\mathrm{359}}^1$

素因数の和:464

約数の個数: 32

約数和(自身を含む): 32832000

約数和(自身を除く): 11672181

約数列:

[1, 3, 9, 27, 37, 59, 111, 177, 333, 359, 531, 999, 1077, 1593, 2183, 3231, 6549, 9693, 13283, 19647, 21181, 39849, 58941, 63543, 119547, 190629, 358641, 571887, 783697, 2351091, 7053273, 21159819]

約数ペア:

[(1, 21159819), (3, 7053273), (9, 2351091), (27, 783697), (37, 571887), (59, 358641), (111, 190629), (177, 119547), (333, 63543), (359, 58941), (531, 39849), (999, 21181), (1077, 19647), (1593, 13283), (2183, 9693), (3231, 6549)]