21181428

素因数分解:

$2^2\times 3^2\times {\mathrm{19}}^1\times {\mathrm{173}}^1\times {\mathrm{179}}^1$

素因数の和:381

約数の個数: 72

約数和(自身を含む): 57002400

約数和(自身を除く): 35820972

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 19, 36, 38, 57, 76, 114, 171, 173, 179, 228, 342, 346, 358, 519, 537, 684, 692, 716, 1038, 1074, 1557, 1611, 2076, 2148, 3114, 3222, 3287, 3401, 6228, 6444, 6574, 6802, 9861, 10203, 13148, 13604, 19722, 20406, 29583, 30609, 30967, 39444, 40812, 59166, 61218, 61934, 92901, 118332, 122436, 123868, 185802, 278703, 371604, 557406, 588373, 1114812, 1176746, 1765119, 2353492, 3530238, 5295357, 7060476, 10590714, 21181428]

約数ペア:

[(1, 21181428), (2, 10590714), (3, 7060476), (4, 5295357), (6, 3530238), (9, 2353492), (12, 1765119), (18, 1176746), (19, 1114812), (36, 588373), (38, 557406), (57, 371604), (76, 278703), (114, 185802), (171, 123868), (173, 122436), (179, 118332), (228, 92901), (342, 61934), (346, 61218), (358, 59166), (519, 40812), (537, 39444), (684, 30967), (692, 30609), (716, 29583), (1038, 20406), (1074, 19722), (1557, 13604), (1611, 13148), (2076, 10203), (2148, 9861), (3114, 6802), (3222, 6574), (3287, 6444), (3401, 6228)]