20217990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{1103}}^1$

素因数の和:1173

約数の個数: 64

約数和(自身を含む): 53415936

約数和(自身を除く): 33197946

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 47, 65, 78, 94, 130, 141, 195, 235, 282, 390, 470, 611, 705, 1103, 1222, 1410, 1833, 2206, 3055, 3309, 3666, 5515, 6110, 6618, 9165, 11030, 14339, 16545, 18330, 28678, 33090, 43017, 51841, 71695, 86034, 103682, 143390, 155523, 215085, 259205, 311046, 430170, 518410, 673933, 777615, 1347866, 1555230, 2021799, 3369665, 4043598, 6739330, 10108995, 20217990]

約数ペア:

[(1, 20217990), (2, 10108995), (3, 6739330), (5, 4043598), (6, 3369665), (10, 2021799), (13, 1555230), (15, 1347866), (26, 777615), (30, 673933), (39, 518410), (47, 430170), (65, 311046), (78, 259205), (94, 215085), (130, 155523), (141, 143390), (195, 103682), (235, 86034), (282, 71695), (390, 51841), (470, 43017), (611, 33090), (705, 28678), (1103, 18330), (1222, 16545), (1410, 14339), (1833, 11030), (2206, 9165), (3055, 6618), (3309, 6110), (3666, 5515)]