21419440

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{1663}}^1$

素因数の和:1706

約数の個数: 80

約数和(自身を含む): 59424768

約数和(自身を除く): 38005328

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 35, 40, 46, 56, 70, 80, 92, 112, 115, 140, 161, 184, 230, 280, 322, 368, 460, 560, 644, 805, 920, 1288, 1610, 1663, 1840, 2576, 3220, 3326, 6440, 6652, 8315, 11641, 12880, 13304, 16630, 23282, 26608, 33260, 38249, 46564, 58205, 66520, 76498, 93128, 116410, 133040, 152996, 186256, 191245, 232820, 267743, 305992, 382490, 465640, 535486, 611984, 764980, 931280, 1070972, 1338715, 1529960, 2141944, 2677430, 3059920, 4283888, 5354860, 10709720, 21419440]

約数ペア:

[(1, 21419440), (2, 10709720), (4, 5354860), (5, 4283888), (7, 3059920), (8, 2677430), (10, 2141944), (14, 1529960), (16, 1338715), (20, 1070972), (23, 931280), (28, 764980), (35, 611984), (40, 535486), (46, 465640), (56, 382490), (70, 305992), (80, 267743), (92, 232820), (112, 191245), (115, 186256), (140, 152996), (161, 133040), (184, 116410), (230, 93128), (280, 76498), (322, 66520), (368, 58205), (460, 46564), (560, 38249), (644, 33260), (805, 26608), (920, 23282), (1288, 16630), (1610, 13304), (1663, 12880), (1840, 11641), (2576, 8315), (3220, 6652), (3326, 6440)]