21250728

素因数分解:

$2^3\times 3^3\times {\mathrm{37}}^1\times {\mathrm{2659}}^1$

素因数の和:2711

約数の個数: 64

約数和(自身を含む): 60648000

約数和(自身を除く): 39397272

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 27, 36, 37, 54, 72, 74, 108, 111, 148, 216, 222, 296, 333, 444, 666, 888, 999, 1332, 1998, 2659, 2664, 3996, 5318, 7977, 7992, 10636, 15954, 21272, 23931, 31908, 47862, 63816, 71793, 95724, 98383, 143586, 191448, 196766, 287172, 295149, 393532, 574344, 590298, 787064, 885447, 1180596, 1770894, 2361192, 2656341, 3541788, 5312682, 7083576, 10625364, 21250728]

約数ペア:

[(1, 21250728), (2, 10625364), (3, 7083576), (4, 5312682), (6, 3541788), (8, 2656341), (9, 2361192), (12, 1770894), (18, 1180596), (24, 885447), (27, 787064), (36, 590298), (37, 574344), (54, 393532), (72, 295149), (74, 287172), (108, 196766), (111, 191448), (148, 143586), (216, 98383), (222, 95724), (296, 71793), (333, 63816), (444, 47862), (666, 31908), (888, 23931), (999, 21272), (1332, 15954), (1998, 10636), (2659, 7992), (2664, 7977), (3996, 5318)]