20490700

素因数分解:

$2^2\times 5^2\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{151}}^1$

素因数の和:247

約数の個数: 72

約数和(自身を含む): 47496960

約数和(自身を除く): 27006260

約数列:

[1, 2, 4, 5, 10, 20, 23, 25, 46, 50, 59, 92, 100, 115, 118, 151, 230, 236, 295, 302, 460, 575, 590, 604, 755, 1150, 1180, 1357, 1475, 1510, 2300, 2714, 2950, 3020, 3473, 3775, 5428, 5900, 6785, 6946, 7550, 8909, 13570, 13892, 15100, 17365, 17818, 27140, 33925, 34730, 35636, 44545, 67850, 69460, 86825, 89090, 135700, 173650, 178180, 204907, 222725, 347300, 409814, 445450, 819628, 890900, 1024535, 2049070, 4098140, 5122675, 10245350, 20490700]

約数ペア:

[(1, 20490700), (2, 10245350), (4, 5122675), (5, 4098140), (10, 2049070), (20, 1024535), (23, 890900), (25, 819628), (46, 445450), (50, 409814), (59, 347300), (92, 222725), (100, 204907), (115, 178180), (118, 173650), (151, 135700), (230, 89090), (236, 86825), (295, 69460), (302, 67850), (460, 44545), (575, 35636), (590, 34730), (604, 33925), (755, 27140), (1150, 17818), (1180, 17365), (1357, 15100), (1475, 13892), (1510, 13570), (2300, 8909), (2714, 7550), (2950, 6946), (3020, 6785), (3473, 5900), (3775, 5428)]