21638416

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1$

素因数の和:176

約数の個数: 80

約数和(自身を含む): 48211200

約数和(自身を除く): 26572784

約数列:

[1, 2, 4, 8, 16, 17, 19, 34, 38, 53, 68, 76, 79, 106, 136, 152, 158, 212, 272, 304, 316, 323, 424, 632, 646, 848, 901, 1007, 1264, 1292, 1343, 1501, 1802, 2014, 2584, 2686, 3002, 3604, 4028, 4187, 5168, 5372, 6004, 7208, 8056, 8374, 10744, 12008, 14416, 16112, 16748, 17119, 21488, 24016, 25517, 33496, 34238, 51034, 66992, 68476, 71179, 79553, 102068, 136952, 142358, 159106, 204136, 273904, 284716, 318212, 408272, 569432, 636424, 1138864, 1272848, 1352401, 2704802, 5409604, 10819208, 21638416]

約数ペア:

[(1, 21638416), (2, 10819208), (4, 5409604), (8, 2704802), (16, 1352401), (17, 1272848), (19, 1138864), (34, 636424), (38, 569432), (53, 408272), (68, 318212), (76, 284716), (79, 273904), (106, 204136), (136, 159106), (152, 142358), (158, 136952), (212, 102068), (272, 79553), (304, 71179), (316, 68476), (323, 66992), (424, 51034), (632, 34238), (646, 33496), (848, 25517), (901, 24016), (1007, 21488), (1264, 17119), (1292, 16748), (1343, 16112), (1501, 14416), (1802, 12008), (2014, 10744), (2584, 8374), (2686, 8056), (3002, 7208), (3604, 6004), (4028, 5372), (4187, 5168)]