21000859191

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{97}}^1\times {\mathrm{137}}^1\times {\mathrm{1039}}^1$

素因数の和:1305

約数の個数: 72

約数和(自身を含む): 33460539840

約数和(自身を除く): 12459680649

約数列:

[1, 3, 9, 13, 39, 97, 117, 137, 169, 291, 411, 507, 873, 1039, 1233, 1261, 1521, 1781, 3117, 3783, 5343, 9351, 11349, 13289, 13507, 16029, 16393, 23153, 39867, 40521, 49179, 69459, 100783, 119601, 121563, 142343, 147537, 172757, 175591, 208377, 302349, 427029, 518271, 526773, 907047, 1281087, 1310179, 1554813, 1580319, 1850459, 2245841, 3930537, 5551377, 6737523, 11791611, 13807271, 16654131, 17032327, 20212569, 24055967, 41421813, 51096981, 72167901, 124265439, 153290943, 179494523, 216503703, 538483569, 1615450707, 2333428799, 7000286397, 21000859191]

約数ペア:

[(1, 21000859191), (3, 7000286397), (9, 2333428799), (13, 1615450707), (39, 538483569), (97, 216503703), (117, 179494523), (137, 153290943), (169, 124265439), (291, 72167901), (411, 51096981), (507, 41421813), (873, 24055967), (1039, 20212569), (1233, 17032327), (1261, 16654131), (1521, 13807271), (1781, 11791611), (3117, 6737523), (3783, 5551377), (5343, 3930537), (9351, 2245841), (11349, 1850459), (13289, 1580319), (13507, 1554813), (16029, 1310179), (16393, 1281087), (23153, 907047), (39867, 526773), (40521, 518271), (49179, 427029), (69459, 302349), (100783, 208377), (119601, 175591), (121563, 172757), (142343, 147537)]