21267519

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{359}}^1$

素因数の和:420

約数の個数: 48

約数和(自身を含む): 36771840

約数和(自身を除く): 15504321

約数列:

[1, 3, 7, 13, 21, 31, 39, 49, 91, 93, 147, 217, 273, 359, 403, 637, 651, 1077, 1209, 1519, 1911, 2513, 2821, 4557, 4667, 7539, 8463, 11129, 14001, 17591, 19747, 32669, 33387, 52773, 59241, 77903, 98007, 144677, 228683, 233709, 434031, 545321, 686049, 1012739, 1635963, 3038217, 7089173, 21267519]

約数ペア:

[(1, 21267519), (3, 7089173), (7, 3038217), (13, 1635963), (21, 1012739), (31, 686049), (39, 545321), (49, 434031), (91, 233709), (93, 228683), (147, 144677), (217, 98007), (273, 77903), (359, 59241), (403, 52773), (637, 33387), (651, 32669), (1077, 19747), (1209, 17591), (1519, 14001), (1911, 11129), (2513, 8463), (2821, 7539), (4557, 4667)]