171990

素因数分解:

$2^1\times 3^3\times 5^1\times 7^2\times {\mathrm{13}}^1$

素因数の和:43

約数の個数: 96

約数和(自身を含む): 574560

約数和(自身を除く): 402570

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 13, 14, 15, 18, 21, 26, 27, 30, 35, 39, 42, 45, 49, 54, 63, 65, 70, 78, 90, 91, 98, 105, 117, 126, 130, 135, 147, 182, 189, 195, 210, 234, 245, 270, 273, 294, 315, 351, 378, 390, 441, 455, 490, 546, 585, 630, 637, 702, 735, 819, 882, 910, 945, 1170, 1274, 1323, 1365, 1470, 1638, 1755, 1890, 1911, 2205, 2457, 2646, 2730, 3185, 3510, 3822, 4095, 4410, 4914, 5733, 6370, 6615, 8190, 9555, 11466, 12285, 13230, 17199, 19110, 24570, 28665, 34398, 57330, 85995, 171990]

約数ペア:

[(1, 171990), (2, 85995), (3, 57330), (5, 34398), (6, 28665), (7, 24570), (9, 19110), (10, 17199), (13, 13230), (14, 12285), (15, 11466), (18, 9555), (21, 8190), (26, 6615), (27, 6370), (30, 5733), (35, 4914), (39, 4410), (42, 4095), (45, 3822), (49, 3510), (54, 3185), (63, 2730), (65, 2646), (70, 2457), (78, 2205), (90, 1911), (91, 1890), (98, 1755), (105, 1638), (117, 1470), (126, 1365), (130, 1323), (135, 1274), (147, 1170), (182, 945), (189, 910), (195, 882), (210, 819), (234, 735), (245, 702), (270, 637), (273, 630), (294, 585), (315, 546), (351, 490), (378, 455), (390, 441)]