21239940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{4481}}^1$

素因数の和:4572

約数の個数: 48

約数和(自身を含む): 60238080

約数和(自身を除く): 38998140

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 79, 158, 237, 316, 395, 474, 790, 948, 1185, 1580, 2370, 4481, 4740, 8962, 13443, 17924, 22405, 26886, 44810, 53772, 67215, 89620, 134430, 268860, 353999, 707998, 1061997, 1415996, 1769995, 2123994, 3539990, 4247988, 5309985, 7079980, 10619970, 21239940]

約数ペア:

[(1, 21239940), (2, 10619970), (3, 7079980), (4, 5309985), (5, 4247988), (6, 3539990), (10, 2123994), (12, 1769995), (15, 1415996), (20, 1061997), (30, 707998), (60, 353999), (79, 268860), (158, 134430), (237, 89620), (316, 67215), (395, 53772), (474, 44810), (790, 26886), (948, 22405), (1185, 17924), (1580, 13443), (2370, 8962), (4481, 4740)]