81978260

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1453}}^1$

素因数の和:1513

約数の個数: 96

約数和(自身を含む): 218867712

約数和(自身を除く): 136889452

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 31, 35, 52, 62, 65, 70, 91, 124, 130, 140, 155, 182, 217, 260, 310, 364, 403, 434, 455, 620, 806, 868, 910, 1085, 1453, 1612, 1820, 2015, 2170, 2821, 2906, 4030, 4340, 5642, 5812, 7265, 8060, 10171, 11284, 14105, 14530, 18889, 20342, 28210, 29060, 37778, 40684, 45043, 50855, 56420, 75556, 90086, 94445, 101710, 132223, 180172, 188890, 203420, 225215, 264446, 315301, 377780, 450430, 528892, 585559, 630602, 661115, 900860, 1171118, 1261204, 1322230, 1576505, 2342236, 2644460, 2927795, 3153010, 4098913, 5855590, 6306020, 8197826, 11711180, 16395652, 20494565, 40989130, 81978260]

約数ペア:

[(1, 81978260), (2, 40989130), (4, 20494565), (5, 16395652), (7, 11711180), (10, 8197826), (13, 6306020), (14, 5855590), (20, 4098913), (26, 3153010), (28, 2927795), (31, 2644460), (35, 2342236), (52, 1576505), (62, 1322230), (65, 1261204), (70, 1171118), (91, 900860), (124, 661115), (130, 630602), (140, 585559), (155, 528892), (182, 450430), (217, 377780), (260, 315301), (310, 264446), (364, 225215), (403, 203420), (434, 188890), (455, 180172), (620, 132223), (806, 101710), (868, 94445), (910, 90086), (1085, 75556), (1453, 56420), (1612, 50855), (1820, 45043), (2015, 40684), (2170, 37778), (2821, 29060), (2906, 28210), (4030, 20342), (4340, 18889), (5642, 14530), (5812, 14105), (7265, 11284), (8060, 10171)]