21652515

素因数分解:

$3^5\times 5^1\times {\mathrm{71}}^1\times {\mathrm{251}}^1$

素因数の和:342

約数の個数: 48

約数和(自身を含む): 39626496

約数和(自身を除く): 17973981

約数列:

[1, 3, 5, 9, 15, 27, 45, 71, 81, 135, 213, 243, 251, 355, 405, 639, 753, 1065, 1215, 1255, 1917, 2259, 3195, 3765, 5751, 6777, 9585, 11295, 17253, 17821, 20331, 28755, 33885, 53463, 60993, 86265, 89105, 101655, 160389, 267315, 304965, 481167, 801945, 1443501, 2405835, 4330503, 7217505, 21652515]

約数ペア:

[(1, 21652515), (3, 7217505), (5, 4330503), (9, 2405835), (15, 1443501), (27, 801945), (45, 481167), (71, 304965), (81, 267315), (135, 160389), (213, 101655), (243, 89105), (251, 86265), (355, 60993), (405, 53463), (639, 33885), (753, 28755), (1065, 20331), (1215, 17821), (1255, 17253), (1917, 11295), (2259, 9585), (3195, 6777), (3765, 5751)]