21420705

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{2141}}^1$

素因数の和:2201

約数の個数: 32

約数和(自身を含む): 37013760

約数和(自身を除く): 15593055

約数列:

[1, 3, 5, 15, 23, 29, 69, 87, 115, 145, 345, 435, 667, 2001, 2141, 3335, 6423, 10005, 10705, 32115, 49243, 62089, 147729, 186267, 246215, 310445, 738645, 931335, 1428047, 4284141, 7140235, 21420705]

約数ペア:

[(1, 21420705), (3, 7140235), (5, 4284141), (15, 1428047), (23, 931335), (29, 738645), (69, 310445), (87, 246215), (115, 186267), (145, 147729), (345, 62089), (435, 49243), (667, 32115), (2001, 10705), (2141, 10005), (3335, 6423)]