21780416

素因数分解:

$2^6\times 7^1\times {\mathrm{61}}^1\times {\mathrm{797}}^1$

素因数の和:877

約数の個数: 56

約数和(自身を含む): 50267616

約数和(自身を除く): 28487200

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 61, 64, 112, 122, 224, 244, 427, 448, 488, 797, 854, 976, 1594, 1708, 1952, 3188, 3416, 3904, 5579, 6376, 6832, 11158, 12752, 13664, 22316, 25504, 27328, 44632, 48617, 51008, 89264, 97234, 178528, 194468, 340319, 357056, 388936, 680638, 777872, 1361276, 1555744, 2722552, 3111488, 5445104, 10890208, 21780416]

約数ペア:

[(1, 21780416), (2, 10890208), (4, 5445104), (7, 3111488), (8, 2722552), (14, 1555744), (16, 1361276), (28, 777872), (32, 680638), (56, 388936), (61, 357056), (64, 340319), (112, 194468), (122, 178528), (224, 97234), (244, 89264), (427, 51008), (448, 48617), (488, 44632), (797, 27328), (854, 25504), (976, 22316), (1594, 13664), (1708, 12752), (1952, 11158), (3188, 6832), (3416, 6376), (3904, 5579)]