18461988

素因数分解:

$2^2\times 3^2\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{233}}^1$

素因数の和:345

約数の個数: 72

約数和(自身を含む): 49061376

約数和(自身を除く): 30599388

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 31, 36, 62, 71, 93, 124, 142, 186, 213, 233, 279, 284, 372, 426, 466, 558, 639, 699, 852, 932, 1116, 1278, 1398, 2097, 2201, 2556, 2796, 4194, 4402, 6603, 7223, 8388, 8804, 13206, 14446, 16543, 19809, 21669, 26412, 28892, 33086, 39618, 43338, 49629, 65007, 66172, 79236, 86676, 99258, 130014, 148887, 198516, 260028, 297774, 512833, 595548, 1025666, 1538499, 2051332, 3076998, 4615497, 6153996, 9230994, 18461988]

約数ペア:

[(1, 18461988), (2, 9230994), (3, 6153996), (4, 4615497), (6, 3076998), (9, 2051332), (12, 1538499), (18, 1025666), (31, 595548), (36, 512833), (62, 297774), (71, 260028), (93, 198516), (124, 148887), (142, 130014), (186, 99258), (213, 86676), (233, 79236), (279, 66172), (284, 65007), (372, 49629), (426, 43338), (466, 39618), (558, 33086), (639, 28892), (699, 26412), (852, 21669), (932, 19809), (1116, 16543), (1278, 14446), (1398, 13206), (2097, 8804), (2201, 8388), (2556, 7223), (2796, 6603), (4194, 4402)]