21237972

素因数分解:

$2^2\times 3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{1901}}^1$

素因数の和:1941

約数の個数: 72

約数和(自身を含む): 60711840

約数和(自身を除く): 39473868

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 19, 21, 28, 38, 42, 49, 57, 76, 84, 98, 114, 133, 147, 196, 228, 266, 294, 399, 532, 588, 798, 931, 1596, 1862, 1901, 2793, 3724, 3802, 5586, 5703, 7604, 11172, 11406, 13307, 22812, 26614, 36119, 39921, 53228, 72238, 79842, 93149, 108357, 144476, 159684, 186298, 216714, 252833, 279447, 372596, 433428, 505666, 558894, 758499, 1011332, 1117788, 1516998, 1769831, 3033996, 3539662, 5309493, 7079324, 10618986, 21237972]

約数ペア:

[(1, 21237972), (2, 10618986), (3, 7079324), (4, 5309493), (6, 3539662), (7, 3033996), (12, 1769831), (14, 1516998), (19, 1117788), (21, 1011332), (28, 758499), (38, 558894), (42, 505666), (49, 433428), (57, 372596), (76, 279447), (84, 252833), (98, 216714), (114, 186298), (133, 159684), (147, 144476), (196, 108357), (228, 93149), (266, 79842), (294, 72238), (399, 53228), (532, 39921), (588, 36119), (798, 26614), (931, 22812), (1596, 13307), (1862, 11406), (1901, 11172), (2793, 7604), (3724, 5703), (3802, 5586)]