19309940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{29}}^1\times {\mathrm{197}}^1$

素因数の和:261

約数の個数: 72

約数和(自身を含む): 45654840

約数和(自身を除く): 26344900

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 29, 52, 58, 65, 116, 130, 145, 169, 197, 260, 290, 338, 377, 394, 580, 676, 754, 788, 845, 985, 1508, 1690, 1885, 1970, 2561, 3380, 3770, 3940, 4901, 5122, 5713, 7540, 9802, 10244, 11426, 12805, 19604, 22852, 24505, 25610, 28565, 33293, 49010, 51220, 57130, 66586, 74269, 98020, 114260, 133172, 148538, 166465, 297076, 332930, 371345, 665860, 742690, 965497, 1485380, 1930994, 3861988, 4827485, 9654970, 19309940]

約数ペア:

[(1, 19309940), (2, 9654970), (4, 4827485), (5, 3861988), (10, 1930994), (13, 1485380), (20, 965497), (26, 742690), (29, 665860), (52, 371345), (58, 332930), (65, 297076), (116, 166465), (130, 148538), (145, 133172), (169, 114260), (197, 98020), (260, 74269), (290, 66586), (338, 57130), (377, 51220), (394, 49010), (580, 33293), (676, 28565), (754, 25610), (788, 24505), (845, 22852), (985, 19604), (1508, 12805), (1690, 11426), (1885, 10244), (1970, 9802), (2561, 7540), (3380, 5713), (3770, 5122), (3940, 4901)]