20685420

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16417}}^1$

素因数の和:16439

約数の個数: 72

約数和(自身を含む): 71713824

約数和(自身を除く): 51028404

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 16417, 32834, 49251, 65668, 82085, 98502, 114919, 147753, 164170, 197004, 229838, 246255, 295506, 328340, 344757, 459676, 492510, 574595, 591012, 689514, 738765, 985020, 1034271, 1149190, 1379028, 1477530, 1723785, 2068542, 2298380, 2955060, 3447570, 4137084, 5171355, 6895140, 10342710, 20685420]

約数ペア:

[(1, 20685420), (2, 10342710), (3, 6895140), (4, 5171355), (5, 4137084), (6, 3447570), (7, 2955060), (9, 2298380), (10, 2068542), (12, 1723785), (14, 1477530), (15, 1379028), (18, 1149190), (20, 1034271), (21, 985020), (28, 738765), (30, 689514), (35, 591012), (36, 574595), (42, 492510), (45, 459676), (60, 344757), (63, 328340), (70, 295506), (84, 246255), (90, 229838), (105, 197004), (126, 164170), (140, 147753), (180, 114919), (210, 98502), (252, 82085), (315, 65668), (420, 49251), (630, 32834), (1260, 16417)]