21781728

素因数分解:

$2^5\times 3^2\times {\mathrm{53}}^1\times {\mathrm{1427}}^1$

素因数の和:1496

約数の個数: 72

約数和(自身を含む): 63154728

約数和(自身を除く): 41373000

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 48, 53, 72, 96, 106, 144, 159, 212, 288, 318, 424, 477, 636, 848, 954, 1272, 1427, 1696, 1908, 2544, 2854, 3816, 4281, 5088, 5708, 7632, 8562, 11416, 12843, 15264, 17124, 22832, 25686, 34248, 45664, 51372, 68496, 75631, 102744, 136992, 151262, 205488, 226893, 302524, 410976, 453786, 605048, 680679, 907572, 1210096, 1361358, 1815144, 2420192, 2722716, 3630288, 5445432, 7260576, 10890864, 21781728]

約数ペア:

[(1, 21781728), (2, 10890864), (3, 7260576), (4, 5445432), (6, 3630288), (8, 2722716), (9, 2420192), (12, 1815144), (16, 1361358), (18, 1210096), (24, 907572), (32, 680679), (36, 605048), (48, 453786), (53, 410976), (72, 302524), (96, 226893), (106, 205488), (144, 151262), (159, 136992), (212, 102744), (288, 75631), (318, 68496), (424, 51372), (477, 45664), (636, 34248), (848, 25686), (954, 22832), (1272, 17124), (1427, 15264), (1696, 12843), (1908, 11416), (2544, 8562), (2854, 7632), (3816, 5708), (4281, 5088)]