81980120

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{3889}}^1$

素因数の和:3948

約数の個数: 64

約数和(自身を含む): 201657600

約数和(自身を除く): 119677480

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 31, 34, 40, 62, 68, 85, 124, 136, 155, 170, 248, 310, 340, 527, 620, 680, 1054, 1240, 2108, 2635, 3889, 4216, 5270, 7778, 10540, 15556, 19445, 21080, 31112, 38890, 66113, 77780, 120559, 132226, 155560, 241118, 264452, 330565, 482236, 528904, 602795, 661130, 964472, 1205590, 1322260, 2049503, 2411180, 2644520, 4099006, 4822360, 8198012, 10247515, 16396024, 20495030, 40990060, 81980120]

約数ペア:

[(1, 81980120), (2, 40990060), (4, 20495030), (5, 16396024), (8, 10247515), (10, 8198012), (17, 4822360), (20, 4099006), (31, 2644520), (34, 2411180), (40, 2049503), (62, 1322260), (68, 1205590), (85, 964472), (124, 661130), (136, 602795), (155, 528904), (170, 482236), (248, 330565), (310, 264452), (340, 241118), (527, 155560), (620, 132226), (680, 120559), (1054, 77780), (1240, 66113), (2108, 38890), (2635, 31112), (3889, 21080), (4216, 19445), (5270, 15556), (7778, 10540)]