20921689984

素因数分解:

$2^7\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{63823}}^1$

素因数の和:64047

約数の個数: 64

約数和(自身を含む): 45114632640

約数和(自身を除く): 24192942656

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 104, 128, 197, 208, 394, 416, 788, 832, 1576, 1664, 2561, 3152, 5122, 6304, 10244, 12608, 20488, 25216, 40976, 63823, 81952, 127646, 163904, 255292, 327808, 510584, 829699, 1021168, 1659398, 2042336, 3318796, 4084672, 6637592, 8169344, 12573131, 13275184, 25146262, 26550368, 50292524, 53100736, 100585048, 106201472, 163450703, 201170096, 326901406, 402340192, 653802812, 804680384, 1307605624, 1609360768, 2615211248, 5230422496, 10460844992, 20921689984]

約数ペア:

[(1, 20921689984), (2, 10460844992), (4, 5230422496), (8, 2615211248), (13, 1609360768), (16, 1307605624), (26, 804680384), (32, 653802812), (52, 402340192), (64, 326901406), (104, 201170096), (128, 163450703), (197, 106201472), (208, 100585048), (394, 53100736), (416, 50292524), (788, 26550368), (832, 25146262), (1576, 13275184), (1664, 12573131), (2561, 8169344), (3152, 6637592), (5122, 4084672), (6304, 3318796), (10244, 2042336), (12608, 1659398), (20488, 1021168), (25216, 829699), (40976, 510584), (63823, 327808), (81952, 255292), (127646, 163904)]