19978530

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{4657}}^1$

素因数の和:4691

約数の個数: 64

約数和(自身を含む): 56343168

約数和(自身を除く): 36364638

約数列:

[1, 2, 3, 5, 6, 10, 11, 13, 15, 22, 26, 30, 33, 39, 55, 65, 66, 78, 110, 130, 143, 165, 195, 286, 330, 390, 429, 715, 858, 1430, 2145, 4290, 4657, 9314, 13971, 23285, 27942, 46570, 51227, 60541, 69855, 102454, 121082, 139710, 153681, 181623, 256135, 302705, 307362, 363246, 512270, 605410, 665951, 768405, 908115, 1331902, 1536810, 1816230, 1997853, 3329755, 3995706, 6659510, 9989265, 19978530]

約数ペア:

[(1, 19978530), (2, 9989265), (3, 6659510), (5, 3995706), (6, 3329755), (10, 1997853), (11, 1816230), (13, 1536810), (15, 1331902), (22, 908115), (26, 768405), (30, 665951), (33, 605410), (39, 512270), (55, 363246), (65, 307362), (66, 302705), (78, 256135), (110, 181623), (130, 153681), (143, 139710), (165, 121082), (195, 102454), (286, 69855), (330, 60541), (390, 51227), (429, 46570), (715, 27942), (858, 23285), (1430, 13971), (2145, 9314), (4290, 4657)]