21781494

素因数分解:

$2^1\times 3^3\times 7^1\times {\mathrm{29}}^1\times {\mathrm{1987}}^1$

素因数の和:2034

約数の個数: 64

約数和(自身を含む): 57254400

約数和(自身を除く): 35472906

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 29, 42, 54, 58, 63, 87, 126, 174, 189, 203, 261, 378, 406, 522, 609, 783, 1218, 1566, 1827, 1987, 3654, 3974, 5481, 5961, 10962, 11922, 13909, 17883, 27818, 35766, 41727, 53649, 57623, 83454, 107298, 115246, 125181, 172869, 250362, 345738, 375543, 403361, 518607, 751086, 806722, 1037214, 1210083, 1555821, 2420166, 3111642, 3630249, 7260498, 10890747, 21781494]

約数ペア:

[(1, 21781494), (2, 10890747), (3, 7260498), (6, 3630249), (7, 3111642), (9, 2420166), (14, 1555821), (18, 1210083), (21, 1037214), (27, 806722), (29, 751086), (42, 518607), (54, 403361), (58, 375543), (63, 345738), (87, 250362), (126, 172869), (174, 125181), (189, 115246), (203, 107298), (261, 83454), (378, 57623), (406, 53649), (522, 41727), (609, 35766), (783, 27818), (1218, 17883), (1566, 13909), (1827, 11922), (1987, 10962), (3654, 5961), (3974, 5481)]