21071115

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{181}}^1\times {\mathrm{199}}^1$

素因数の和:404

約数の個数: 48

約数和(自身を含む): 39748800

約数和(自身を除く): 18677685

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 181, 195, 199, 543, 585, 597, 905, 995, 1629, 1791, 2353, 2587, 2715, 2985, 7059, 7761, 8145, 8955, 11765, 12935, 21177, 23283, 35295, 36019, 38805, 105885, 108057, 116415, 180095, 324171, 468247, 540285, 1404741, 1620855, 2341235, 4214223, 7023705, 21071115]

約数ペア:

[(1, 21071115), (3, 7023705), (5, 4214223), (9, 2341235), (13, 1620855), (15, 1404741), (39, 540285), (45, 468247), (65, 324171), (117, 180095), (181, 116415), (195, 108057), (199, 105885), (543, 38805), (585, 36019), (597, 35295), (905, 23283), (995, 21177), (1629, 12935), (1791, 11765), (2353, 8955), (2587, 8145), (2715, 7761), (2985, 7059)]