21139860

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{50333}}^1$

素因数の和:50352

約数の個数: 48

約数和(自身を含む): 67648896

約数和(自身を除く): 46509036

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, 50333, 100666, 150999, 201332, 251665, 301998, 352331, 503330, 603996, 704662, 754995, 1006660, 1056993, 1409324, 1509990, 1761655, 2113986, 3019980, 3523310, 4227972, 5284965, 7046620, 10569930, 21139860]

約数ペア:

[(1, 21139860), (2, 10569930), (3, 7046620), (4, 5284965), (5, 4227972), (6, 3523310), (7, 3019980), (10, 2113986), (12, 1761655), (14, 1509990), (15, 1409324), (20, 1056993), (21, 1006660), (28, 754995), (30, 704662), (35, 603996), (42, 503330), (60, 352331), (70, 301998), (84, 251665), (105, 201332), (140, 150999), (210, 100666), (420, 50333)]