21391304

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{181}}^1$

素因数の和:294

約数の個数: 64

約数和(自身を含む): 47174400

約数和(自身を除く): 25783096

約数列:

[1, 2, 4, 8, 11, 17, 22, 34, 44, 68, 79, 88, 136, 158, 181, 187, 316, 362, 374, 632, 724, 748, 869, 1343, 1448, 1496, 1738, 1991, 2686, 3077, 3476, 3982, 5372, 6154, 6952, 7964, 10744, 12308, 14299, 14773, 15928, 24616, 28598, 29546, 33847, 57196, 59092, 67694, 114392, 118184, 135388, 157289, 243083, 270776, 314578, 486166, 629156, 972332, 1258312, 1944664, 2673913, 5347826, 10695652, 21391304]

約数ペア:

[(1, 21391304), (2, 10695652), (4, 5347826), (8, 2673913), (11, 1944664), (17, 1258312), (22, 972332), (34, 629156), (44, 486166), (68, 314578), (79, 270776), (88, 243083), (136, 157289), (158, 135388), (181, 118184), (187, 114392), (316, 67694), (362, 59092), (374, 57196), (632, 33847), (724, 29546), (748, 28598), (869, 24616), (1343, 15928), (1448, 14773), (1496, 14299), (1738, 12308), (1991, 10744), (2686, 7964), (3077, 6952), (3476, 6154), (3982, 5372)]