20889645

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{283}}^1$

素因数の和:354

約数の個数: 64

約数和(自身を含む): 41441280

約数和(自身を除く): 20551635

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 37, 57, 95, 105, 111, 133, 185, 259, 283, 285, 399, 555, 665, 703, 777, 849, 1295, 1415, 1981, 1995, 2109, 3515, 3885, 4245, 4921, 5377, 5943, 9905, 10471, 10545, 14763, 16131, 24605, 26885, 29715, 31413, 37639, 52355, 73297, 73815, 80655, 112917, 157065, 188195, 198949, 219891, 366485, 564585, 596847, 994745, 1099455, 1392643, 2984235, 4177929, 6963215, 20889645]

約数ペア:

[(1, 20889645), (3, 6963215), (5, 4177929), (7, 2984235), (15, 1392643), (19, 1099455), (21, 994745), (35, 596847), (37, 564585), (57, 366485), (95, 219891), (105, 198949), (111, 188195), (133, 157065), (185, 112917), (259, 80655), (283, 73815), (285, 73297), (399, 52355), (555, 37639), (665, 31413), (703, 29715), (777, 26885), (849, 24605), (1295, 16131), (1415, 14763), (1981, 10545), (1995, 10471), (2109, 9905), (3515, 5943), (3885, 5377), (4245, 4921)]