21441212

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{283}}^1$

素因数の和:378

約数の個数: 48

約数和(自身を含む): 42749952

約数和(自身を除く): 21308740

約数列:

[1, 2, 4, 13, 26, 31, 47, 52, 62, 94, 124, 188, 283, 403, 566, 611, 806, 1132, 1222, 1457, 1612, 2444, 2914, 3679, 5828, 7358, 8773, 13301, 14716, 17546, 18941, 26602, 35092, 37882, 53204, 75764, 114049, 172913, 228098, 345826, 412331, 456196, 691652, 824662, 1649324, 5360303, 10720606, 21441212]

約数ペア:

[(1, 21441212), (2, 10720606), (4, 5360303), (13, 1649324), (26, 824662), (31, 691652), (47, 456196), (52, 412331), (62, 345826), (94, 228098), (124, 172913), (188, 114049), (283, 75764), (403, 53204), (566, 37882), (611, 35092), (806, 26602), (1132, 18941), (1222, 17546), (1457, 14716), (1612, 13301), (2444, 8773), (2914, 7358), (3679, 5828)]