257858900

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{1427}}^1$

素因数の和:1593

約数の個数: 72

約数和(自身を含む): 607356960

約数和(自身を除く): 349498060

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 130, 139, 260, 278, 325, 556, 650, 695, 1300, 1390, 1427, 1807, 2780, 2854, 3475, 3614, 5708, 6950, 7135, 7228, 9035, 13900, 14270, 18070, 18551, 28540, 35675, 36140, 37102, 45175, 71350, 74204, 90350, 92755, 142700, 180700, 185510, 198353, 371020, 396706, 463775, 793412, 927550, 991765, 1855100, 1983530, 2578589, 3967060, 4958825, 5157178, 9917650, 10314356, 12892945, 19835300, 25785890, 51571780, 64464725, 128929450, 257858900]

約数ペア:

[(1, 257858900), (2, 128929450), (4, 64464725), (5, 51571780), (10, 25785890), (13, 19835300), (20, 12892945), (25, 10314356), (26, 9917650), (50, 5157178), (52, 4958825), (65, 3967060), (100, 2578589), (130, 1983530), (139, 1855100), (260, 991765), (278, 927550), (325, 793412), (556, 463775), (650, 396706), (695, 371020), (1300, 198353), (1390, 185510), (1427, 180700), (1807, 142700), (2780, 92755), (2854, 90350), (3475, 74204), (3614, 71350), (5708, 45175), (6950, 37102), (7135, 36140), (7228, 35675), (9035, 28540), (13900, 18551), (14270, 18070)]