21269640

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25321}}^1$

素因数の和:25342

約数の個数: 64

約数和(自身を含む): 72927360

約数和(自身を除く): 51657720

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 25321, 50642, 75963, 101284, 126605, 151926, 177247, 202568, 253210, 303852, 354494, 379815, 506420, 531741, 607704, 708988, 759630, 886235, 1012840, 1063482, 1417976, 1519260, 1772470, 2126964, 2658705, 3038520, 3544940, 4253928, 5317410, 7089880, 10634820, 21269640]

約数ペア:

[(1, 21269640), (2, 10634820), (3, 7089880), (4, 5317410), (5, 4253928), (6, 3544940), (7, 3038520), (8, 2658705), (10, 2126964), (12, 1772470), (14, 1519260), (15, 1417976), (20, 1063482), (21, 1012840), (24, 886235), (28, 759630), (30, 708988), (35, 607704), (40, 531741), (42, 506420), (56, 379815), (60, 354494), (70, 303852), (84, 253210), (105, 202568), (120, 177247), (140, 151926), (168, 126605), (210, 101284), (280, 75963), (420, 50642), (840, 25321)]