81245890

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{1889}}^1$

素因数の和:1947

約数の個数: 64

約数和(自身を含む): 176359680

約数和(自身を除く): 95113790

約数列:

[1, 2, 5, 10, 11, 17, 22, 23, 34, 46, 55, 85, 110, 115, 170, 187, 230, 253, 374, 391, 506, 782, 935, 1265, 1870, 1889, 1955, 2530, 3778, 3910, 4301, 8602, 9445, 18890, 20779, 21505, 32113, 41558, 43010, 43447, 64226, 86894, 103895, 160565, 207790, 217235, 321130, 353243, 434470, 477917, 706486, 738599, 955834, 1477198, 1766215, 2389585, 3532430, 3692995, 4779170, 7385990, 8124589, 16249178, 40622945, 81245890]

約数ペア:

[(1, 81245890), (2, 40622945), (5, 16249178), (10, 8124589), (11, 7385990), (17, 4779170), (22, 3692995), (23, 3532430), (34, 2389585), (46, 1766215), (55, 1477198), (85, 955834), (110, 738599), (115, 706486), (170, 477917), (187, 434470), (230, 353243), (253, 321130), (374, 217235), (391, 207790), (506, 160565), (782, 103895), (935, 86894), (1265, 64226), (1870, 43447), (1889, 43010), (1955, 41558), (2530, 32113), (3778, 21505), (3910, 20779), (4301, 18890), (8602, 9445)]