20475140

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{1229}}^1$

素因数の和:1269

約数の個数: 72

約数和(自身を含む): 53003160

約数和(自身を除く): 32528020

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 34, 35, 49, 68, 70, 85, 98, 119, 140, 170, 196, 238, 245, 340, 476, 490, 595, 833, 980, 1190, 1229, 1666, 2380, 2458, 3332, 4165, 4916, 6145, 8330, 8603, 12290, 16660, 17206, 20893, 24580, 34412, 41786, 43015, 60221, 83572, 86030, 104465, 120442, 146251, 172060, 208930, 240884, 292502, 301105, 417860, 585004, 602210, 731255, 1023757, 1204420, 1462510, 2047514, 2925020, 4095028, 5118785, 10237570, 20475140]

約数ペア:

[(1, 20475140), (2, 10237570), (4, 5118785), (5, 4095028), (7, 2925020), (10, 2047514), (14, 1462510), (17, 1204420), (20, 1023757), (28, 731255), (34, 602210), (35, 585004), (49, 417860), (68, 301105), (70, 292502), (85, 240884), (98, 208930), (119, 172060), (140, 146251), (170, 120442), (196, 104465), (238, 86030), (245, 83572), (340, 60221), (476, 43015), (490, 41786), (595, 34412), (833, 24580), (980, 20893), (1190, 17206), (1229, 16660), (1666, 12290), (2380, 8603), (2458, 8330), (3332, 6145), (4165, 4916)]