19871930

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{4931}}^1$

素因数の和:4982

約数の個数: 32

約数和(自身を含む): 39771648

約数和(自身を除く): 19899718

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 130, 155, 310, 403, 806, 2015, 4030, 4931, 9862, 24655, 49310, 64103, 128206, 152861, 305722, 320515, 641030, 764305, 1528610, 1987193, 3974386, 9935965, 19871930]

約数ペア:

[(1, 19871930), (2, 9935965), (5, 3974386), (10, 1987193), (13, 1528610), (26, 764305), (31, 641030), (62, 320515), (65, 305722), (130, 152861), (155, 128206), (310, 64103), (403, 49310), (806, 24655), (2015, 9862), (4030, 4931)]