21186045

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{349}}^1$

素因数の和:450

約数の個数: 48

約数和(自身を含む): 39312000

約数和(自身を除く): 18125955

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 71, 95, 171, 213, 285, 349, 355, 639, 855, 1047, 1065, 1349, 1745, 3141, 3195, 4047, 5235, 6631, 6745, 12141, 15705, 19893, 20235, 24779, 33155, 59679, 60705, 74337, 99465, 123895, 223011, 298395, 371685, 470801, 1115055, 1412403, 2354005, 4237209, 7062015, 21186045]

約数ペア:

[(1, 21186045), (3, 7062015), (5, 4237209), (9, 2354005), (15, 1412403), (19, 1115055), (45, 470801), (57, 371685), (71, 298395), (95, 223011), (171, 123895), (213, 99465), (285, 74337), (349, 60705), (355, 59679), (639, 33155), (855, 24779), (1047, 20235), (1065, 19893), (1349, 15705), (1745, 12141), (3141, 6745), (3195, 6631), (4047, 5235)]