21237015

素因数分解:

$3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1\times {\mathrm{419}}^1$

素因数の和:567

約数の個数: 32

約数和(自身を含む): 35481600

約数和(自身を除く): 14244585

約数列:

[1, 3, 5, 15, 31, 93, 109, 155, 327, 419, 465, 545, 1257, 1635, 2095, 3379, 6285, 10137, 12989, 16895, 38967, 45671, 50685, 64945, 137013, 194835, 228355, 685065, 1415801, 4247403, 7079005, 21237015]

約数ペア:

[(1, 21237015), (3, 7079005), (5, 4247403), (15, 1415801), (31, 685065), (93, 228355), (109, 194835), (155, 137013), (327, 64945), (419, 50685), (465, 45671), (545, 38967), (1257, 16895), (1635, 12989), (2095, 10137), (3379, 6285)]