20509905

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{269}}^1$

素因数の和:330

約数の個数: 64

約数和(自身を含む): 39191040

約数和(自身を除く): 18681135

約数列:

[1, 3, 5, 13, 15, 17, 23, 39, 51, 65, 69, 85, 115, 195, 221, 255, 269, 299, 345, 391, 663, 807, 897, 1105, 1173, 1345, 1495, 1955, 3315, 3497, 4035, 4485, 4573, 5083, 5865, 6187, 10491, 13719, 15249, 17485, 18561, 22865, 25415, 30935, 52455, 59449, 68595, 76245, 80431, 92805, 105179, 178347, 241293, 297245, 315537, 402155, 525895, 891735, 1206465, 1367327, 1577685, 4101981, 6836635, 20509905]

約数ペア:

[(1, 20509905), (3, 6836635), (5, 4101981), (13, 1577685), (15, 1367327), (17, 1206465), (23, 891735), (39, 525895), (51, 402155), (65, 315537), (69, 297245), (85, 241293), (115, 178347), (195, 105179), (221, 92805), (255, 80431), (269, 76245), (299, 68595), (345, 59449), (391, 52455), (663, 30935), (807, 25415), (897, 22865), (1105, 18561), (1173, 17485), (1345, 15249), (1495, 13719), (1955, 10491), (3315, 6187), (3497, 5865), (4035, 5083), (4485, 4573)]