20784225

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1$

素因数の和:151

約数の個数: 96

約数和(自身を含む): 44282880

約数和(自身を除く): 23498655

約数列:

[1, 3, 5, 7, 11, 15, 21, 25, 33, 35, 55, 59, 61, 75, 77, 105, 165, 175, 177, 183, 231, 275, 295, 305, 385, 413, 427, 525, 649, 671, 825, 885, 915, 1155, 1239, 1281, 1475, 1525, 1925, 1947, 2013, 2065, 2135, 3245, 3355, 3599, 4425, 4543, 4575, 4697, 5775, 6195, 6405, 9735, 10065, 10325, 10675, 10797, 13629, 14091, 16225, 16775, 17995, 22715, 23485, 25193, 30975, 32025, 39589, 48675, 50325, 53985, 68145, 70455, 75579, 89975, 113575, 117425, 118767, 125965, 197945, 269925, 277123, 340725, 352275, 377895, 593835, 629825, 831369, 989725, 1385615, 1889475, 2969175, 4156845, 6928075, 20784225]

約数ペア:

[(1, 20784225), (3, 6928075), (5, 4156845), (7, 2969175), (11, 1889475), (15, 1385615), (21, 989725), (25, 831369), (33, 629825), (35, 593835), (55, 377895), (59, 352275), (61, 340725), (75, 277123), (77, 269925), (105, 197945), (165, 125965), (175, 118767), (177, 117425), (183, 113575), (231, 89975), (275, 75579), (295, 70455), (305, 68145), (385, 53985), (413, 50325), (427, 48675), (525, 39589), (649, 32025), (671, 30975), (825, 25193), (885, 23485), (915, 22715), (1155, 17995), (1239, 16775), (1281, 16225), (1475, 14091), (1525, 13629), (1925, 10797), (1947, 10675), (2013, 10325), (2065, 10065), (2135, 9735), (3245, 6405), (3355, 6195), (3599, 5775), (4425, 4697), (4543, 4575)]