21753795

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{1741}}^1$

素因数の和:1780

約数の個数: 48

約数和(自身を含む): 42895008

約数和(自身を除く): 21141213

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 49, 51, 85, 105, 119, 147, 245, 255, 357, 595, 735, 833, 1741, 1785, 2499, 4165, 5223, 8705, 12187, 12495, 26115, 29597, 36561, 60935, 85309, 88791, 147985, 182805, 207179, 255927, 426545, 443955, 621537, 1035895, 1279635, 1450253, 3107685, 4350759, 7251265, 21753795]

約数ペア:

[(1, 21753795), (3, 7251265), (5, 4350759), (7, 3107685), (15, 1450253), (17, 1279635), (21, 1035895), (35, 621537), (49, 443955), (51, 426545), (85, 255927), (105, 207179), (119, 182805), (147, 147985), (245, 88791), (255, 85309), (357, 60935), (595, 36561), (735, 29597), (833, 26115), (1741, 12495), (1785, 12187), (2499, 8705), (4165, 5223)]