128401520

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{331}}^1\times {\mathrm{373}}^1$

素因数の和:730

約数の個数: 80

約数和(自身を含む): 323333472

約数和(自身を除く): 194931952

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 331, 373, 520, 662, 746, 1040, 1324, 1492, 1655, 1865, 2648, 2984, 3310, 3730, 4303, 4849, 5296, 5968, 6620, 7460, 8606, 9698, 13240, 14920, 17212, 19396, 21515, 24245, 26480, 29840, 34424, 38792, 43030, 48490, 68848, 77584, 86060, 96980, 123463, 172120, 193960, 246926, 344240, 387920, 493852, 617315, 987704, 1234630, 1605019, 1975408, 2469260, 3210038, 4938520, 6420076, 8025095, 9877040, 12840152, 16050190, 25680304, 32100380, 64200760, 128401520]

約数ペア:

[(1, 128401520), (2, 64200760), (4, 32100380), (5, 25680304), (8, 16050190), (10, 12840152), (13, 9877040), (16, 8025095), (20, 6420076), (26, 4938520), (40, 3210038), (52, 2469260), (65, 1975408), (80, 1605019), (104, 1234630), (130, 987704), (208, 617315), (260, 493852), (331, 387920), (373, 344240), (520, 246926), (662, 193960), (746, 172120), (1040, 123463), (1324, 96980), (1492, 86060), (1655, 77584), (1865, 68848), (2648, 48490), (2984, 43030), (3310, 38792), (3730, 34424), (4303, 29840), (4849, 26480), (5296, 24245), (5968, 21515), (6620, 19396), (7460, 17212), (8606, 14920), (9698, 13240)]