81379220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{251}}^1$

素因数の和:345

約数の個数: 96

約数和(自身を含む): 195592320

約数和(自身を除く): 114213100

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 29, 43, 52, 58, 65, 86, 116, 130, 145, 172, 215, 251, 260, 290, 377, 430, 502, 559, 580, 754, 860, 1004, 1118, 1247, 1255, 1508, 1885, 2236, 2494, 2510, 2795, 3263, 3770, 4988, 5020, 5590, 6235, 6526, 7279, 7540, 10793, 11180, 12470, 13052, 14558, 16211, 16315, 21586, 24940, 29116, 32422, 32630, 36395, 43172, 53965, 64844, 65260, 72790, 81055, 94627, 107930, 140309, 145580, 162110, 189254, 215860, 280618, 312997, 324220, 378508, 473135, 561236, 625994, 701545, 946270, 1251988, 1403090, 1564985, 1892540, 2806180, 3129970, 4068961, 6259940, 8137922, 16275844, 20344805, 40689610, 81379220]

約数ペア:

[(1, 81379220), (2, 40689610), (4, 20344805), (5, 16275844), (10, 8137922), (13, 6259940), (20, 4068961), (26, 3129970), (29, 2806180), (43, 1892540), (52, 1564985), (58, 1403090), (65, 1251988), (86, 946270), (116, 701545), (130, 625994), (145, 561236), (172, 473135), (215, 378508), (251, 324220), (260, 312997), (290, 280618), (377, 215860), (430, 189254), (502, 162110), (559, 145580), (580, 140309), (754, 107930), (860, 94627), (1004, 81055), (1118, 72790), (1247, 65260), (1255, 64844), (1508, 53965), (1885, 43172), (2236, 36395), (2494, 32630), (2510, 32422), (2795, 29116), (3263, 24940), (3770, 21586), (4988, 16315), (5020, 16211), (5590, 14558), (6235, 13052), (6526, 12470), (7279, 11180), (7540, 10793)]