21502012

素因数分解:

$2^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{12589}}^1$

素因数の和:12661

約数の個数: 24

約数和(自身を含む): 43712480

約数和(自身を除く): 22210468

約数列:

[1, 2, 4, 7, 14, 28, 61, 122, 244, 427, 854, 1708, 12589, 25178, 50356, 88123, 176246, 352492, 767929, 1535858, 3071716, 5375503, 10751006, 21502012]

約数ペア:

[(1, 21502012), (2, 10751006), (4, 5375503), (7, 3071716), (14, 1535858), (28, 767929), (61, 352492), (122, 176246), (244, 88123), (427, 50356), (854, 25178), (1708, 12589)]