12040180

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:280

約数の個数: 48

約数和(自身を含む): 26248320

約数和(自身を除く): 14208140

約数列:

[1, 2, 4, 5, 10, 20, 61, 71, 122, 139, 142, 244, 278, 284, 305, 355, 556, 610, 695, 710, 1220, 1390, 1420, 2780, 4331, 8479, 8662, 9869, 16958, 17324, 19738, 21655, 33916, 39476, 42395, 43310, 49345, 84790, 86620, 98690, 169580, 197380, 602009, 1204018, 2408036, 3010045, 6020090, 12040180]

約数ペア:

[(1, 12040180), (2, 6020090), (4, 3010045), (5, 2408036), (10, 1204018), (20, 602009), (61, 197380), (71, 169580), (122, 98690), (139, 86620), (142, 84790), (244, 49345), (278, 43310), (284, 42395), (305, 39476), (355, 33916), (556, 21655), (610, 19738), (695, 17324), (710, 16958), (1220, 9869), (1390, 8662), (1420, 8479), (2780, 4331)]