21159968

素因数分解:

$2^5\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{401}}^1$

素因数の和:525

約数の個数: 48

約数和(自身を含む): 44675064

約数和(自身を除く): 23515096

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 68, 97, 136, 194, 272, 388, 401, 544, 776, 802, 1552, 1604, 1649, 3104, 3208, 3298, 6416, 6596, 6817, 12832, 13192, 13634, 26384, 27268, 38897, 52768, 54536, 77794, 109072, 155588, 218144, 311176, 622352, 661249, 1244704, 1322498, 2644996, 5289992, 10579984, 21159968]

約数ペア:

[(1, 21159968), (2, 10579984), (4, 5289992), (8, 2644996), (16, 1322498), (17, 1244704), (32, 661249), (34, 622352), (68, 311176), (97, 218144), (136, 155588), (194, 109072), (272, 77794), (388, 54536), (401, 52768), (544, 38897), (776, 27268), (802, 26384), (1552, 13634), (1604, 13192), (1649, 12832), (3104, 6817), (3208, 6596), (3298, 6416)]