21513968

素因数分解:

$2^4\times 7^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1$

素因数の和:190

約数の個数: 80

約数和(自身を含む): 50187264

約数和(自身を除く): 28673296

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 47, 56, 61, 67, 94, 112, 122, 134, 188, 244, 268, 329, 376, 427, 469, 488, 536, 658, 752, 854, 938, 976, 1072, 1316, 1708, 1876, 2632, 2867, 3149, 3416, 3752, 4087, 5264, 5734, 6298, 6832, 7504, 8174, 11468, 12596, 16348, 20069, 22043, 22936, 25192, 28609, 32696, 40138, 44086, 45872, 50384, 57218, 65392, 80276, 88172, 114436, 160552, 176344, 192089, 228872, 321104, 352688, 384178, 457744, 768356, 1344623, 1536712, 2689246, 3073424, 5378492, 10756984, 21513968]

約数ペア:

[(1, 21513968), (2, 10756984), (4, 5378492), (7, 3073424), (8, 2689246), (14, 1536712), (16, 1344623), (28, 768356), (47, 457744), (56, 384178), (61, 352688), (67, 321104), (94, 228872), (112, 192089), (122, 176344), (134, 160552), (188, 114436), (244, 88172), (268, 80276), (329, 65392), (376, 57218), (427, 50384), (469, 45872), (488, 44086), (536, 40138), (658, 32696), (752, 28609), (854, 25192), (938, 22936), (976, 22043), (1072, 20069), (1316, 16348), (1708, 12596), (1876, 11468), (2632, 8174), (2867, 7504), (3149, 6832), (3416, 6298), (3752, 5734), (4087, 5264)]