81990510

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{20549}}^1$

素因数の和:20585

約数の個数: 64

約数和(自身を含む): 236736000

約数和(自身を除く): 154745490

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 19, 21, 30, 35, 38, 42, 57, 70, 95, 105, 114, 133, 190, 210, 266, 285, 399, 570, 665, 798, 1330, 1995, 3990, 20549, 41098, 61647, 102745, 123294, 143843, 205490, 287686, 308235, 390431, 431529, 616470, 719215, 780862, 863058, 1171293, 1438430, 1952155, 2157645, 2342586, 2733017, 3904310, 4315290, 5466034, 5856465, 8199051, 11712930, 13665085, 16398102, 27330170, 40995255, 81990510]

約数ペア:

[(1, 81990510), (2, 40995255), (3, 27330170), (5, 16398102), (6, 13665085), (7, 11712930), (10, 8199051), (14, 5856465), (15, 5466034), (19, 4315290), (21, 3904310), (30, 2733017), (35, 2342586), (38, 2157645), (42, 1952155), (57, 1438430), (70, 1171293), (95, 863058), (105, 780862), (114, 719215), (133, 616470), (190, 431529), (210, 390431), (266, 308235), (285, 287686), (399, 205490), (570, 143843), (665, 123294), (798, 102745), (1330, 61647), (1995, 41098), (3990, 20549)]