21503580

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{51199}}^1$

素因数の和:51218

約数の個数: 48

約数和(自身を含む): 68812800

約数和(自身を除く): 47309220

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 51199, 102398, 153597, 204796, 255995, 307194, 358393, 511990, 614388, 716786, 767985, 1023980, 1075179, 1433572, 1535970, 1791965, 2150358, 3071940, 3583930, 4300716, 5375895, 7167860, 10751790, 21503580]

約数ペア:

[(1, 21503580), (2, 10751790), (3, 7167860), (4, 5375895), (5, 4300716), (6, 3583930), (7, 3071940), (10, 2150358), (12, 1791965), (14, 1535970), (15, 1433572), (20, 1075179), (21, 1023980), (28, 767985), (30, 716786), (35, 614388), (42, 511990), (60, 358393), (70, 307194), (84, 255995), (105, 204796), (140, 153597), (210, 102398), (420, 51199)]