21748065

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{557}}^1$

素因数の和:721

約数の個数: 32

約数和(自身を含む): 36961920

約数和(自身を除く): 15213855

約数列:

[1, 3, 5, 15, 19, 57, 95, 137, 285, 411, 557, 685, 1671, 2055, 2603, 2785, 7809, 8355, 10583, 13015, 31749, 39045, 52915, 76309, 158745, 228927, 381545, 1144635, 1449871, 4349613, 7249355, 21748065]

約数ペア:

[(1, 21748065), (3, 7249355), (5, 4349613), (15, 1449871), (19, 1144635), (57, 381545), (95, 228927), (137, 158745), (285, 76309), (411, 52915), (557, 39045), (685, 31749), (1671, 13015), (2055, 10583), (2603, 8355), (2785, 7809)]