21653520

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{12889}}^1$

素因数の和:12912

約数の個数: 80

約数和(自身を含む): 76721280

約数和(自身を除く): 55067760

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 105, 112, 120, 140, 168, 210, 240, 280, 336, 420, 560, 840, 1680, 12889, 25778, 38667, 51556, 64445, 77334, 90223, 103112, 128890, 154668, 180446, 193335, 206224, 257780, 270669, 309336, 360892, 386670, 451115, 515560, 541338, 618672, 721784, 773340, 902230, 1031120, 1082676, 1353345, 1443568, 1546680, 1804460, 2165352, 2706690, 3093360, 3608920, 4330704, 5413380, 7217840, 10826760, 21653520]

約数ペア:

[(1, 21653520), (2, 10826760), (3, 7217840), (4, 5413380), (5, 4330704), (6, 3608920), (7, 3093360), (8, 2706690), (10, 2165352), (12, 1804460), (14, 1546680), (15, 1443568), (16, 1353345), (20, 1082676), (21, 1031120), (24, 902230), (28, 773340), (30, 721784), (35, 618672), (40, 541338), (42, 515560), (48, 451115), (56, 386670), (60, 360892), (70, 309336), (80, 270669), (84, 257780), (105, 206224), (112, 193335), (120, 180446), (140, 154668), (168, 128890), (210, 103112), (240, 90223), (280, 77334), (336, 64445), (420, 51556), (560, 38667), (840, 25778), (1680, 12889)]