20218900

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{151}}^1$

素因数の和:281

約数の個数: 72

約数和(自身を含む): 48024704

約数和(自身を除く): 27805804

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 103, 130, 151, 206, 260, 302, 325, 412, 515, 604, 650, 755, 1030, 1300, 1339, 1510, 1963, 2060, 2575, 2678, 3020, 3775, 3926, 5150, 5356, 6695, 7550, 7852, 9815, 10300, 13390, 15100, 15553, 19630, 26780, 31106, 33475, 39260, 49075, 62212, 66950, 77765, 98150, 133900, 155530, 196300, 202189, 311060, 388825, 404378, 777650, 808756, 1010945, 1555300, 2021890, 4043780, 5054725, 10109450, 20218900]

約数ペア:

[(1, 20218900), (2, 10109450), (4, 5054725), (5, 4043780), (10, 2021890), (13, 1555300), (20, 1010945), (25, 808756), (26, 777650), (50, 404378), (52, 388825), (65, 311060), (100, 202189), (103, 196300), (130, 155530), (151, 133900), (206, 98150), (260, 77765), (302, 66950), (325, 62212), (412, 49075), (515, 39260), (604, 33475), (650, 31106), (755, 26780), (1030, 19630), (1300, 15553), (1339, 15100), (1510, 13390), (1963, 10300), (2060, 9815), (2575, 7852), (2678, 7550), (3020, 6695), (3775, 5356), (3926, 5150)]