178656820

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{3461}}^1$

素因数の和:3588

約数の個数: 48

約数和(自身を含む): 392590800

約数和(自身を除く): 213933980

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 89, 116, 145, 178, 290, 356, 445, 580, 890, 1780, 2581, 3461, 5162, 6922, 10324, 12905, 13844, 17305, 25810, 34610, 51620, 69220, 100369, 200738, 308029, 401476, 501845, 616058, 1003690, 1232116, 1540145, 2007380, 3080290, 6160580, 8932841, 17865682, 35731364, 44664205, 89328410, 178656820]

約数ペア:

[(1, 178656820), (2, 89328410), (4, 44664205), (5, 35731364), (10, 17865682), (20, 8932841), (29, 6160580), (58, 3080290), (89, 2007380), (116, 1540145), (145, 1232116), (178, 1003690), (290, 616058), (356, 501845), (445, 401476), (580, 308029), (890, 200738), (1780, 100369), (2581, 69220), (3461, 51620), (5162, 34610), (6922, 25810), (10324, 17305), (12905, 13844)]