198727580

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{349}}^1\times {\mathrm{401}}^1$

素因数の和:830

約数の個数: 48

約数和(自身を含む): 425476800

約数和(自身を除く): 226749220

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 349, 355, 401, 698, 710, 802, 1396, 1420, 1604, 1745, 2005, 3490, 4010, 6980, 8020, 24779, 28471, 49558, 56942, 99116, 113884, 123895, 139949, 142355, 247790, 279898, 284710, 495580, 559796, 569420, 699745, 1399490, 2798980, 9936379, 19872758, 39745516, 49681895, 99363790, 198727580]

約数ペア:

[(1, 198727580), (2, 99363790), (4, 49681895), (5, 39745516), (10, 19872758), (20, 9936379), (71, 2798980), (142, 1399490), (284, 699745), (349, 569420), (355, 559796), (401, 495580), (698, 284710), (710, 279898), (802, 247790), (1396, 142355), (1420, 139949), (1604, 123895), (1745, 113884), (2005, 99116), (3490, 56942), (4010, 49558), (6980, 28471), (8020, 24779)]