20819940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{353}}^1\times {\mathrm{983}}^1$

素因数の和:1348

約数の個数: 48

約数和(自身を含む): 58520448

約数和(自身を除く): 37700508

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 353, 706, 983, 1059, 1412, 1765, 1966, 2118, 2949, 3530, 3932, 4236, 4915, 5295, 5898, 7060, 9830, 10590, 11796, 14745, 19660, 21180, 29490, 58980, 346999, 693998, 1040997, 1387996, 1734995, 2081994, 3469990, 4163988, 5204985, 6939980, 10409970, 20819940]

約数ペア:

[(1, 20819940), (2, 10409970), (3, 6939980), (4, 5204985), (5, 4163988), (6, 3469990), (10, 2081994), (12, 1734995), (15, 1387996), (20, 1040997), (30, 693998), (60, 346999), (353, 58980), (706, 29490), (983, 21180), (1059, 19660), (1412, 14745), (1765, 11796), (1966, 10590), (2118, 9830), (2949, 7060), (3530, 5898), (3932, 5295), (4236, 4915)]