21338235

素因数分解:

$3^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{59}}^1$

素因数の和:142

約数の個数: 80

約数和(自身を含む): 41817600

約数和(自身を除く): 20479365

約数列:

[1, 3, 5, 9, 15, 19, 27, 45, 47, 57, 59, 81, 95, 135, 141, 171, 177, 235, 285, 295, 405, 423, 513, 531, 705, 855, 885, 893, 1121, 1269, 1539, 1593, 2115, 2565, 2655, 2679, 2773, 3363, 3807, 4465, 4779, 5605, 6345, 7695, 7965, 8037, 8319, 10089, 13395, 13865, 16815, 19035, 23895, 24111, 24957, 30267, 40185, 41595, 50445, 52687, 72333, 74871, 90801, 120555, 124785, 151335, 158061, 224613, 263435, 361665, 374355, 454005, 474183, 790305, 1123065, 1422549, 2370915, 4267647, 7112745, 21338235]

約数ペア:

[(1, 21338235), (3, 7112745), (5, 4267647), (9, 2370915), (15, 1422549), (19, 1123065), (27, 790305), (45, 474183), (47, 454005), (57, 374355), (59, 361665), (81, 263435), (95, 224613), (135, 158061), (141, 151335), (171, 124785), (177, 120555), (235, 90801), (285, 74871), (295, 72333), (405, 52687), (423, 50445), (513, 41595), (531, 40185), (705, 30267), (855, 24957), (885, 24111), (893, 23895), (1121, 19035), (1269, 16815), (1539, 13865), (1593, 13395), (2115, 10089), (2565, 8319), (2655, 8037), (2679, 7965), (2773, 7695), (3363, 6345), (3807, 5605), (4465, 4779)]