21639540

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{27743}}^1$

素因数の和:27768

約数の個数: 48

約数和(自身を含む): 65253888

約数和(自身を除く): 43614348

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 27743, 55486, 83229, 110972, 138715, 166458, 277430, 332916, 360659, 416145, 554860, 721318, 832290, 1081977, 1442636, 1664580, 1803295, 2163954, 3606590, 4327908, 5409885, 7213180, 10819770, 21639540]

約数ペア:

[(1, 21639540), (2, 10819770), (3, 7213180), (4, 5409885), (5, 4327908), (6, 3606590), (10, 2163954), (12, 1803295), (13, 1664580), (15, 1442636), (20, 1081977), (26, 832290), (30, 721318), (39, 554860), (52, 416145), (60, 360659), (65, 332916), (78, 277430), (130, 166458), (156, 138715), (195, 110972), (260, 83229), (390, 55486), (780, 27743)]