21063705

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{991}}^1$

素因数の和:1121

約数の個数: 32

約数和(自身を含む): 36664320

約数和(自身を除く): 15600615

約数列:

[1, 3, 5, 13, 15, 39, 65, 109, 195, 327, 545, 991, 1417, 1635, 2973, 4251, 4955, 7085, 12883, 14865, 21255, 38649, 64415, 108019, 193245, 324057, 540095, 1404247, 1620285, 4212741, 7021235, 21063705]

約数ペア:

[(1, 21063705), (3, 7021235), (5, 4212741), (13, 1620285), (15, 1404247), (39, 540095), (65, 324057), (109, 193245), (195, 108019), (327, 64415), (545, 38649), (991, 21255), (1417, 14865), (1635, 12883), (2973, 7085), (4251, 4955)]