21918242521

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{431}}^1\times {\mathrm{4789}}^1$

素因数の和:5305

約数の個数: 32

約数和(自身を含む): 26420567040

約数和(自身を除く): 4502324519

約数列:

[1, 7, 37, 41, 259, 287, 431, 1517, 3017, 4789, 10619, 15947, 17671, 33523, 111629, 123697, 177193, 196349, 653827, 1240351, 1374443, 2064059, 4576789, 7264913, 14448413, 50854391, 76370183, 84626419, 534591281, 592384933, 3131177503, 21918242521]

約数ペア:

[(1, 21918242521), (7, 3131177503), (37, 592384933), (41, 534591281), (259, 84626419), (287, 76370183), (431, 50854391), (1517, 14448413), (3017, 7264913), (4789, 4576789), (10619, 2064059), (15947, 1374443), (17671, 1240351), (33523, 653827), (111629, 196349), (123697, 177193)]