21780456678

素因数分解:

$2^1\times 3^2\times {\mathrm{17}}^2\times {\mathrm{479}}^1\times {\mathrm{8741}}^1$

素因数の和:9262

約数の個数: 72

約数和(自身を含む): 50240623680

約数和(自身を除く): 28460167002

約数列:

[1, 2, 3, 6, 9, 17, 18, 34, 51, 102, 153, 289, 306, 479, 578, 867, 958, 1437, 1734, 2601, 2874, 4311, 5202, 8143, 8622, 8741, 16286, 17482, 24429, 26223, 48858, 52446, 73287, 78669, 138431, 146574, 148597, 157338, 276862, 297194, 415293, 445791, 830586, 891582, 1245879, 1337373, 2491758, 2526149, 2674746, 4186939, 5052298, 7578447, 8373878, 12560817, 15156894, 22735341, 25121634, 37682451, 45470682, 71177963, 75364902, 142355926, 213533889, 427067778, 640601667, 1210025371, 1281203334, 2420050742, 3630076113, 7260152226, 10890228339, 21780456678]

約数ペア:

[(1, 21780456678), (2, 10890228339), (3, 7260152226), (6, 3630076113), (9, 2420050742), (17, 1281203334), (18, 1210025371), (34, 640601667), (51, 427067778), (102, 213533889), (153, 142355926), (289, 75364902), (306, 71177963), (479, 45470682), (578, 37682451), (867, 25121634), (958, 22735341), (1437, 15156894), (1734, 12560817), (2601, 8373878), (2874, 7578447), (4311, 5052298), (5202, 4186939), (8143, 2674746), (8622, 2526149), (8741, 2491758), (16286, 1337373), (17482, 1245879), (24429, 891582), (26223, 830586), (48858, 445791), (52446, 415293), (73287, 297194), (78669, 276862), (138431, 157338), (146574, 148597)]